I wouldn't be able to tell a bad movie from a movie I personally don't like, so it's hard for me to say.
I don't like Star wars, LOTR, Harry Potters etc, but I can see how they can appeal to some people.
To be fair, I though Black Panther was just a shitty movie though, popular just because of the media attention around how black it was.
I also don't like any Superhero movies, except of Deadpool, because it's actually funny. I used to read the comic books as a kid, but found all superhero movies I was forced to watch completely boring.