I actually agree with him that most superhero movies suck.
i would say it's more like
25%- good to great
50% average-to slightly below average
25%-suck
pretty silly to just not watch any of them at all just because you think the majority of them suck. all you're doing is providing a disservice to yourself by missing the really good ones.
Recent Batman trilogy, a few of the X Men movies, that's about it for the good-great list.
The rest of them look horrible.