While Apple does indeed make things difficult, they're not actually the problem in this case.
The reason mac users are complaining is because Valve released this as an update to CS:GO rather than a separate game.
I don't think mac players would really care that much about CS2 not being mac compatible if Valve hadn't done that. They would've shrugged and said "ok, I'll keep playing CS:GO then". But they can't do that, and that is 100% on Valve.
Valve could have handled it better, but you can still play CS:GO. Right click > Properties > Betas. I've used it to play a mod that hasn't been updated for CS2. There's very little playercount though.
The reason mac users are complaining is because Valve released this as an update to CS:GO rather than a separate game.
I don't think mac players would really care that much about CS2 not being mac compatible if Valve hadn't done that. They would've shrugged and said "ok, I'll keep playing CS:GO then". But they can't do that, and that is 100% on Valve.