Because it's a glorified cashgrab and attempt to tap the human-doll/toy-market. Yes, MLP has always been just an elaborate commercial to sell toys, but the show has its merits. EQG is fairly bland (the first even more so than the second) and I never really liked the designs.
Admittedly, I hated the movies more before I watched them, but now I just think they're meh. Mediocre. Not awfully bad, but not exactly good either. The only enjoyable thing about the second movie was Sunset Shimmer, I can see that people who are into plastic pop might like this more, but I personally disliked almost the entire soundttrack except for "Under our spell" or whatever that song was called, which was okay.
I guess they work just fine for the target audience.
And - as so often - the porn is actually not too bad.
So to answer your questions>why so much hatred against equestria girls?
no hooves>Why cant horse fuckers just grow up and get used to the fact that it happened,
they got used to it, which doesn't mean they have to like it.>and it's now a big part of the show; semi-big that is.
Bad choice of words. It's not at all part of the show. They're part of the MLP-Universe, they are canon as stand-alone movies, but until it's directly mentioned or showed in the show, it's not canon for FIM no, pony-Flash in the show doesn't count
.>It's a seperate and semi-big part of the MLP-Universe
Yes, this is correct.