If you have recently updated your MWIII and kept receiving "DirectX encountered an unrecoverable error" then maybe some changes in the Settings could help get rid of the crash after a match
New PC Features
GeForce RTX gamers can activate pre-game full ray tracing, also known as path tracing in pre-game lobbies, enabling you to see your characters, skins, vehicles, and weapons in an entirely new light.
All GeForce RTX gamers can activate Path Tracing via the Video options menu, and doing so will automatically enable NVIDIA DLSS 3.5 with DLSS Ray Reconstruction.
Disabling the Ray Tracing , Disabling Ray Reconstruction , should eliminate the crashes , till Activision decides to fix it.