I agree that it’s a pretty bad idea to bring back Palpatine, and that the execution of that idea was also really bad, but this idea has been in the Star Wars universe for a long time
What’s funny is that I didn’t know about that (I’m a movies only type on SW, never known much about the extended universe), but I actually think it’s fine as an idea. Just needed to be presented better.
I would like, for instance to know how, if at all, Palpatine and Snoke were connected. The sudden loss of Snoke in TLJ really robbed the sequels of their villain far too soon. If he had stuck around to IX, and then was revealed to be a front for Palpatine (with explanation for his survival) that would have worked better.
Still though, I really enjoyed IX, which I know is an unpopular opinion, but after TLJ, it just felt right again, even if lots of it was very silly.