@Wiimeiser
Oof. Unfortunately, I don’t know all the details about his history of falling out with the show & fandom. All I can remember is that he started off well with making a Familar Faces episodes about the history of MLP’s cartoons and how they lead up to FiM which he loved at the time. Then he started making his own review series for FiM in which he foreshadowed in another one of his videos that him talking with someone about suddenly controversial The Mysterious Mare-Do-Well. He then made videos about Swarm of the Century and The Super Speedy Cider Squeezy 6000 which I never watched and a video about Luna Eclipsed which I did see. I had a difficult time trying to understand what his thoughts were for that episode but he along with ManiacalDude had a problem with Luna’s reintroduction.
Things seemed to be heading south for CR after that video and then the shit completely hit the fan when A Canterlot Wedding arrived. From what I heard, he was part of a livestream watching the episode and he was completely bitching the entire way through. After that, all I’ve seen his comments he’s made related to Season 3 saying that they’re just like the third and fourth seasons of Dexter’s Laboratory or some other shows he thinks turned bad. I think he also hates Celestia which put him in my shitlist from that point on. A Canterlot Wedding was the last straw for him but he also expressed obvious disdain for Twilicorn and Equestria Girls. And this is all I can remember.
I could dig into more but I would prefer not to drag my mood down from reading his bullcrap again.