Since Valve released Counter-Strike 2 on Sept. 27th, it has become the studio's lowest-rated game on Steam. Intended to be an improved version of its predecessor, Counter-Strike: Global Offensive, CS2 revamped elements such as its game engine and maps. Despite CS2's mixed reviews, it builds upon CS: GO's previous title of being Steam's most popular game, boasting an even higher player count.
Source:https://www.cbr.com/counter-strike-2-lowest-rated-problems-steam-valve/