Taxi Driver isn't a bad movie. It's a movie you don't like. Those are two completely different things, and people on this sub REALLY need to start using those two completely different concepts correctly.

It's OK just to say you don't like something. There are plenty of works of art which are universally considered to be great which I just don't care for. But that doesn't make them bad, it just means I don't appreciate them as much as other people, and that's OK.