I have no desire to watch endgame
Is there a reason?
I'm not really interested in the Avengers or action movies.
That's fine if you're not into the Avengers movies, or the action genre in general.  Just because they are popular, doesn't mean that everyone will like them.
I'm going to say I don't like endgame just because it's popular...
It's okay to not like a movie based on its merits, but to dislike it because it is popular is really no better than loving it because it is popular.  Movies are works of art, even when they are crass, and should be judged as such.  Popularity should have nothing to do with whether you like it or not.