Coop was not reliable since the beginning. I can recall decades of issues in coop. As i can confirm issues in all the other options too. Once i could tell you to go online and you’ll have no issues, but this would be a lie too. For single player? I better not speak!
So!
Yes, in this game be sure that eventually you’ll have issues no matter what option you’ll use, so of course place your complain, it’s necessary feedback, but don’t break your heart at the same time. Try to take advantage of this misfortune and role play.
Or quit, your call.
The good part of playing coop is that you can restore unfair loss from admin panel. But try to restore only the loss, because the game will “lose” and you’ll surely regret that.
Cheers m8.