Adding on to my list:
~ Lack of any singleplayer content.
~ Microtransactions.
~ Invisible walls.
~ AI that is impossibly good/horrifyingly bad.
~ Lack of mod support. (What? I love modding my games!)
~ Really cheap jumpscares. (I adore jumpscares, I really do, heck even cheap ones, but sometimes they're just not even worth having there)