For me the first thing that comes to mind is Tales from Earthsea. I don’t think it’s excellent or anything and has plenty of problems but people act like it killed their dog. While it has its problems that have been covered extensively, I think it has a beautiful atmosphere and art.
IMO it would have been better received if it wasn’t advertised as an Earthsea adaptation and was just its own thing.
Manos initially took me a few times to get through (even with MST3K), but now when I randomly run across it on the dumb industries twitch stream or the MST3K YouTube/twitch streams I get a little excited. It really doesn’t make my “skin crawl” like it used to, but it’s still terrible.
I’ve seen it with dumb industries, rifftrax, and MST3K.
I can’t imagine watching it more than once. I’ve just been trying to forget about it for the last fifteen years.