Yea, some of them mention “it’s decent if it were 30 $/£/€”.
Also, on the salt mines Steam forums there’s some mentions of unfavorable reviews being deleted, dunno how much credibility there is for such claims.
Steam does remove the occasional wave of reviewbombing, but AFAIK only when the reviews focus on some aspect not directly related to the game. Would be weird if they allowed publishers/devs delete reviews.