Racist caricatures in The Phantom Menace? I’m guessing you’re talking about the Gungans or maybe the trade federation? I have no idea but I don’t see George Lucas as a racist. You can literally find a form of racism in any movie you watch, if you’re looking hard enough to find it. To be honest, I don’t know how anybody walks into a movie trying to find out all the social injustices that are portrayed in a movie unless it’s something very blatant and intended. Our society is shifting in a way that soon everything will be offensive to one person or another and movies still just plain suck.
I think you're over generalizing the fandom and I have to wholeheartedly disagree with what you're saying.
I don't know where you get off saying fans went into TFA determined to hate it. Yes, my friends and I were peeved when Disney trashed the EU, but we were still optimistic and looking forward to the new trilogy. We enjoyed TFA, ranking it as the 4th best SW movie at the time, Rogue One has since surpassed it in our opinion. I think with an 87% audience score on Rotten Tomatoes, this is the general sentiment amongst die hard and casual fans alike. Sure, TLJ was a piece of junk that I wish I could un-watch and erase from my memory, but most SW fans I know went into this new trilogy with an open mind.
I'm not sure where you're getting bad fanfiction territory from either. JJ Abrams basically stole ideas from multiple successful EU story lines and from the original trilogy and amalgamated them into TFA. I always found JJ to be somewhat unoriginal (Star Trek Into Darkness The Return of Khan anyone?). TLJ was written by Rian Johnson and that wasn’t so much as a SW story as it was someone trying to shove their political ideology down our throats. He is also in my estimation nowhere near being a Star Wars fan.
Not all EU storylines are centered around the 3 heroes. Off the top of my head, there is the X-Wing series, the Boba Fett trilogy, the Old Republic series, etc…all good storylines where where the 3 heroes make cameo or no appearances at all.
Again, I don’t see any hate from fans for TFA, if you could please show me you’re getting this idea from. JJ tried to make this movie appeal to the broad general audience which I think he succeeded in doing. The movie earned over 2 billion at the box office and I don’t see a need to panic here as you stated and change direction for TLJ. It is because Rian Johnson tried to pander to a specific audience, on top of making a trash movie, are Disney in panic mode and trying to right the ship with RoS. Rogue one was in own rights a successful movie, generating over 1 billion at the box office with an 84% audience score. Solo was an unfortunate casualty of the hate that was generated by TLJ.