"Skill can be bought" means that people buy cheats left and right and that the game is infested with cheats to a point where it's unplayable.

Even pro players complain about the state it's in and a lot of streamers left the game until this is fixed. Pretty similar to the situation in Tarkov.

You want a source? A simple search for cs2 cheating on Youtube should suffice.

Understood. I was just interested in why that's the case, as I know almost nothing about the game. No need for that last paragraph...