You literally said "Undercover Girl isn't hard, you're just suck at side-scrolling beat 'em up genre", so yeah, you did mention the game.
Also, telling someone that they suck at something and then not giving actual reasons why the game should not be in F-Tier is not you speaking your mind, its you being an ass.
Now I get that you are unhappy, because someone on the Internet said that a Game you like is bad. But don't forget, its called personal preference and it sucks, cause everyone has a different one. And like the OP says himself:
"I would like to emphasize that this list is ultimately subjective. If you don't like it, go find another list."
So if you don't like this List, then no one is stopping you from taking a look at other lists or putting in the work to make your own.
But please, don't be an ass about it.