While you're certainly not wrong and running a KH game show is by definition autistic, I totally get where that dude is coming from in terms of Chibi hijacking the idea for his own benefit so shortly after it was unveiled. Don't forget that this is all one community and Chibi is blatantly trying to hop onto someone else's "thing" without being wanted, much less invited. It doesn't matter how autistic the "thing" initially was, it was that guy's "thing" in this community and now Chibi decided that he wants a slice of that attention. I'm sure that in Chibi's ideal world, no one would have noticed or cared that he basically took over someone else's "thing", eventually the lines would get so blurry that he could act like he came up with the idea of bringing Family Feud to KH, etc.
TLDR: Combining Family Feud and KH is as autistic as combining Pikachu and Sonic, but if you're the first to do it and then a few days later someone comes along and tries to do the same thing for their own personal benefit (attention, engagement, followers, etc. on Twitch) then I think that being a bit irked by that is definitely warranted. Plus, it's Chibi, who is already pretty clearly disliked in the community, tarnishing your project with his name and presence.