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.
We LOVED this film, and even convinced our local cinema to have a sing along one night.
The first time we watched it we had to leave the cinema early due to a tornado warning. But we were so pleasantly surprised by what we saw (expected trash after those awful trailers) that we went again. And then again.