Well, first off, I didn't seem to get a notification for some reason... maybe you should try that again?
And second of all, it's to be expected with any community that has retro and gamer fans, and a place where 2D games are made usually translates into the fact that people aren't getting what they want in a Sonic game, so they're making their own. Retro fans are belligerent because they have a very specific definition of what a "sonic" game defines...
Just imagine if Sonic Boom or Shadow the Hedgehog weren't based on the Sonic IP. Sure the technical faults leave much to be desired, but they got needless hate for simply being labeled with "Sonic" on them, even if they weren't such bad games after all. (Though I must agree, '06 is just objectively bad). That's really the reason Sonic gets so much hate these days: the most influential and militant of Sonic fans believe that any deviation of "Sonic's purity" must be destroyed.
Sometimes it loops into hypocrisy, because people will complain if the mainstream Sonic games become too "dark and edgy" but ignore or even celebrate the dark themes of the comics. Those two fanbases are so distant and disparate that you probably won't find them in each others' communities, though a rough guess suggests most of you have read the comics.
From all of this and my own observations, I could group Sonic fans into three types: Those who only care about the games (call them "Gamers"), Those who care about the story and character designs (call them "Mobians"), and those who overlap both (and we can call these, "Fans").... though I may be wrong, or make really vague stereotypes... but hell, I'm sure it's pretty accurate.
The Gamers are those who want to play Sonic, but only as a video game; they won't be die-hard fans because they simply like the games, and if they don't like it, they're going to play other games. They're the most numerous outside the fanbase, because Sonic is just another game they've played instead of a fandom they're in. If they are die-hard Sonic fans, expect them to have a canon Sonic character as their avatar, and probably are retro fans. They're most influential because professional critics are in this camp.
The Mobians are those people making fanart and fanfiction, and usually have a Sonic-based character as their avatar. Some of them ship, some of them make fancharacters, and some just go along with their lives, but most importantly they all actually care about the characters and plot of Sonic franchises, whether it's the games, or the comics... but they might not actually play the games, or only a few. Some of these people, if they've had enough of Sonic, just become regular furries, but only some. Judging by my observations, I believe we mostly fit in this camp.
Then of course, are the Fans. Most of us are probably here. They are like Mobians but do focus on playing the games as well.
All of them can be crazy. We've discussed what crazy Gamers can do. Mobians can argue and flame over non-canon relationships and some even act like they're in a relationship with fictional Sonic characters. And Fans can be both.
The problem is the human element. So the solution is just to eliminate all humans to see our own problems, and what's so wrong with ourselves.
Eh, what am I to say, I don't even like platformers, and I wasn't even born yet in 1991. The reason I'm on this site is because I want to join a fangame community that solves its own problems enough not to complain all the time. Our fanbase is fucked, but not the franchise I suppose.