It was crashing like crazy for me too. UNTIL I realized that for some reason the "Xbox One" version was instralled.
You need to check in your "game list" if you have the logo X|S displayed on the COD game. If not you installed the wrong one.
I've installed proper Series X version right from the start. I've heard that there are issues that it installs Xbox One version by default because of Activision being greedy and not offering Smart Delivery. But thank god I've cancelled it because I didn't want to install everything which it does right after buying the game.