With VPN u'll get kicked from almost every single server. There are exeptions obviously, like DRF (Dirk Rockface) servers for BO1 and BO2, but they are not vanilla ones, i personally don't like them.
So either turn off VPN once u reach the game main menu (but for me it doesn't really work, cause i can't load into the servers - stuck at the loading screen), or try to figure out how to make zapret work for u.