Evil people ruined the show.
Who allowed a literal *4CHANNER* to work on the creative development team for a show such as this one that is supposed to be 100% objectively safe for everyone including children? What a way to take a show that was specifically themed on *FRIENDSHIP*, and turn those morals upside down on their heads!
Lauren Faust admitted that she took "thoughtful critique" from 4chan and given the blatant ableism that started appearing in the show more and more, it clearly shows. Although I think the question should be asked "WHAT WAS SHE THINKING?!", I sadly feel like it would fall on deaf ears. As outrageous as this is, she clearly acts like she sees no problem with it whatsoever.
Proof that she did this can be found on various "news" websites, including ones like Equestria Daily - but as that website and some others are run by evil 4channers themselves, be careful when googling this, and read stuff at your own risk.
Hasbro has clearly shown they have no desire to change - no apologies were given, and the main designer for G5 ponies clearly shows that she's a big Lauren Faust fan, there is proof of this on Twitter. Although one of the ableist scenes was edited out, this was only temporary and many other ableist scenes along with other types of mean stereotypes remained in the show and were never removed in the first place.
And none of the "but she's not the director *anymore*" nonsense. Fact is, someone of the highest tier of internet evil was allowed to get *anywhere near* the official MLP studio, or into doing work for a company like Hasbro in an official capacity... I don't care who they are or how much time had passed.... just HOW WAS IT ABLE TO HAPPEN?!