Hmm... isn't Blizzard's main FPS title Overwatch though? Cheating seems pretty common in that game (and there are tons of forum threads where people are complaining about it).
Forum threads aren't a great measure of cheating though, given the toxicity and inability of the average gamer to admit "the other player was better than me."
I have about 1500 hours in OW and OW2. I can't recall ever playing with/against a cheater.
There are tons of forum threads about gamers complaining about every single game in history. Seriously, most gaming forums are incredibly toxic.