Anime, just like any piece of media, is subject to a lot of opinions from its viewers and with those opinions come critiques that not everyone may necessarily agree with. These "hot takes" can sometimes be more rooted in bias or personal opinion rather than actual fact, which is why many of them can be unpopular. Despite their unpopularity, some can make a decent point.
Source:https://www.cbr.com/anime-hot-takes-that-make-sense/