I'm sure I'll get a lot of hate because of this post, but it's not gonna be more than Sam Raimi's Spider-Man 3 is getting since its release in 2007. Also, english isn't my first language, so I'll probably make errors here and there, but you should understand my point.
I was reading posts about Spider-Man being in the MCU and something was frequently coming, and coming back, and you know what, coming back again; Spider-Man 3 was a disaster, was beyond bad, was awful, ... ENOUGH! I don't get this blind rage about this movie and I think arguments against the movie are wrong, just fanboys' whims who didn't get what they wanted (they got it with the "Amazing" franchise apparently) and say it's one of the worst super-hero movie ever made. I may be a minority about it, but I'm sure Spider-Man 3 isn't a bad movie, neither an average movie. And I may be a smaller minority to think it, but I think Spider-Man 3 is a great movie. Yeah, you read right, a great movie, misloved, but great! And I don't care about what Sam Raimi said, that the movie is a mess. So, I'll prove my point by explaining why all your arguments and (Raimi's) are rotten.
Oh, and the only thing I disliked in the movie is Peter being cool with the fact to be Spider-Man, make him look way more different from the two first movies. But I think it's normal. I mean, he found the perfect balance between his two lifes, so it's okay he's cool about it.
I'll start with an explanation from the director himself, Sam Raimi, a reason why the movie failed according to him: he left the character development. Wrong! I'll start with Peter and Mary-Jane, their character evolve in the movie. During the movie, Peter and MJ are making selfish choices; Peter kissing Gwen and MJ hiding she's been fired (and having a date with Harry). At the end, they have to learn to put their selfishness away, do what is right, to be together, as a couple, and make it works. Also, their relationship is way better than Spider-Man 2's (the best Spidey movie...). I mean, MJ is complaining about the fact Peter didn't saw her play... Alright b*tch, Peter has two jobs, studies, money issues, his aunt has issues too and (right you don't know that) he's freaking Spider-Man! Your Jon saw it 7 times? Yeah, he's in vacation! Harry saw it 2 times? He's rich as sh*t, he could see better plays! Aunt May and your mother saw it? Yeah, they're retired! Also, Peter made his way to the theater, but Bruce Campbell acted like a crap and he told you! Okay, I'll calm down. Still, the writers are the ones who wrote Smallville too!
Also, Harry has character development, his amnesia is there for that. The movie shows us a part we forgot from Harry, even pushing it further, showing him as a real friend with Peter and starting to be in love with MJ. And he brings the moral with his development: being upset by revenge to understand it won't change anything and choose to do what's right, save his best friends. So, no Sam, you didn't left the character development, the trio is developed very well. But what about the villains?
Second, too many villains. "Three, it's too much and it is the guarantee of a failure!" Yeah, how many is there in each X-men movies? Does it make them bad (X3 is bad but not because of that)? How many bad guys are in every Batman movies? I think the problem is link to my previous point, there wouldn't be enough time to develop them. The thing is, it's wrong too! For Harry, I already explained how his character is developed in the movie. Even there, the guy is developed since two movies before Raimi makes him a total villain, so... About the Sandman, he's too. He's introduced as a criminal who isn't actually that bad, he just wants to help his daughter, even if he has to steal the money for it. Also, he didn't really choose to be a monster, to be a criminal, that, he got push to it. Also, the scene where he's becoming the Sandman is just magnificent, all you need to know about the guy is there, Raimi could have just put that scene to introduce the character, it would have been enough... Just with THAT scene, you can't say the movie sucks. For Venom, I'll keep him for later...
My other point, there it is: Emo Peter! Personally, I laughed of all those scenes. But, you were like: "Peter jerking in the streets, disgusting! Being an emo, HA! Blow up Harry's face, awful! Dancing twice, in the street then in a bar, YARK! Gush I hated those scenes!" You thought that when you saw all that, well, you were WR-- right.... Yeah, you were right.... But, do you know why you are right to hate those scenes? I'll tell why: THAT WAS THE POINT! You're suppose to hate Peter when is an emo, jerking in the streets, dancing, blowing up his best friend's face, and why? Because of the black suit. The thing Raimi wanted to show is how bad this crap is and how evil it can turn people into by showing it through Peter; a model guy turned into a bad person. Did Raimi was right to show it with such stupid scenes? Yeah! It's according to the kitsch style he used for the whole trilogy. I mean, don't go see a super-hero movie expecting everything to be serious, it's a movie about people with super-powers, the idea itself is stupid. So, stop with the Green Goblin's dialogues and Doc Ock mechanical arms' AI too, it's stupid but the concept of a Spider-Man is too... So, what was the point for all this "awful" sequences?
Finally, my last point. The one why fanboys have so much hate for the movie. One of the reason why the franchise got rebooted (and a second time since). Look out, here comes Venom! You probably skiped to whole text to know why I think Venom isn't bad in Spider-Man 3. If you didn't, thank you! If you did, whatever.... So why is there so much hate about him? The first reason is we don't get to see his face must of the time he appears. Seriously.... SERIOUSLY! Take your remote and use the pause button if it's bother you that much! The other reasons are his screen time and development. All right, first, who is Venom? It's the combining of the symbiot and the human host, using the powers the symbiot got from Spidey to do their evil stuff. So, can we say Emo Peter=Venom? In some sort of a weird way, yeah, we got Venom during 2/3 of the movie! All right it's kind of tricky, so forget it. But, what is the original story of Venom, the first time he appeard in the original comic (could you back me up Linkara?). Basically, it's just Eddie blaming Spidey for ruining his life, randomly find the black suit and they do their crap... That's what we got in the movie! You're blaming the movie to not be loyal to the comic comparatively to the Amazing franchise, but it was, and more than you think! Yeah, there's more story after in the comics but the base is there. Does it justify the weak of character development? Yes it does. Because Eddie Brock is just a jerk (more than Emo Peter), there's no need to develop the guy. Some villains are just assholes, they aren't all like Doc Ock with his great developement in Spider-Man 2, some are just bad guys because they are bad, that's it! Also, I don't hear a lot of complain about Double-Face's screen time in Nolan's The Dark Knight, considered by a lot of people like THE best super-hero movie. His screen time's kind of equal to Venom's...
In the end, I hope I helped you to change your mind (a bit at least) about Spider-Man 3 if you used to hate. If you still hate it, it's you but, seriously, stop saying this is a bad movie. To me, the movie is equal to the first Spider-Man, the 2 is still the best to me (even with the Peter/MJ relationship), but I think I proved the movie didn't diserved all this hate. Also that Raimi shouldn't be ashame of it and that Spider-Man 4 should have happen. So, let's see what Marvel is going to do with our favorite web-slinger!