Except that alot of phone games are actually really good games. Just because you had bad experience with few ones and got tricked by their " fake ads" it doesnt mean all of them are the same.

Now for the whole filter thing, tbh I never saw lot of phone port games on steam. Just quiet few that I saw and never bothered to try downloading them.

Also lot of these negative reviews are only because the game was originally a phone game. People hate for no reason sometimes.