If you select North America as your only server region, the matchmaker will still occasionally throw you into Europoor servers. I understand that this is intentional because the devs want to prioritize quick matchmaking queues but that negates the purpose of selecting a server region rather than having all of them ticked.
I don’t even care if I have to wait longer to get into a match, just let us choose which server regions to play in on our own. Seriously, I just leave every match when I see that I’m in a European server so just let us players stick to what we want or upgrade the Enlisted and CRSED servers to run at 60HZ to make the network experience better.