Same thing happening to me starting today. First few days of S21 worked OK. Now every game (multiplayer or firing range) will eventually black screen and completely crash the computer. No responses, can't reboot windows video drivers (win + ctrl + shift + b), can't access task manager. I have to physically hold the power button to restart the computer.
Running 8700k, RTX 2070. Updated Nvidia drivers to current release (552.44), repaired Apex game files via the EA app, cleared cache, rebooted PC to no avail. Other games and benchmarking tools running fine, so it isn't a dying video card.