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.
It was pretty uniformly popular in France, but elsewhere it did rather split opinion. Critics were not kind to it then either, but considering it was originally a teenage pet project of Besson’s but later got concept art from Mézières and Moebius explains a lot.
First I thought you meant RHPS, and I thought, popular in France, that makes sense…