I never understood not watching a show because of the fanbase. I watch plenty of shows without ever interacting with the fandom at all.
What’s stopping you from watching the show without visiting discussion forums or reading youtube comments about it?
They did a really good job. I was catching up on the show the other day and I knew Roiland got replaced at some point but I didn’t know when. So I waited for the voices to noticeably change and after I finished season 7 I realized I already watched an entire season with the new voice actors without realizing.
For me it’s Metal music. It’s just absolutely not my genre but an overwhelming amount of metalheads I met were just the nicest, most wholesome and fun people all around.