You just described my experience with MOBA games like League of Legends and Dota. Around 15 years ago there were only about 50-60 playable characters. Nowadays there are more than 100 and more items and customizations.

As for shooters this is the same. Too many weapons classes and subclasses, maps, game modes eventually divide and distract the playerbase from the core essence of the game.

I think this is one of the reasons that you still see Counter Strike still around.