Yeah, the Mac issue is a concern. Surprisingly, Valve dropped that without warning. CS2 being a free upgrade to CSGO was touted for a while. It's almost impossible to miss if you play CSGO. The issue is that you bought into a game knowing it was a GAAS game and you expected it to never change for the worse. If you played CSGO for any length of time you'll remember weekends of one-shot kill revolvers and 2 hit-kill deagles. So clearly, it's not out of scope for Valve to push an update to break things. Maybe you'll get a Mac version back, or maybe they'll put back the matchmaking servers. Maybe you'll find that GAAS games are terrible for the gaming ecosystem and will abandon them. Lots of solutions here, only one path you control.

Overall CS2 is getting good-ish reviews. So it's unlikely you'll get CSGO fully back.