That's the bare minimum time I give until the new players realize that there are other weapons than the M1 Garand and other classes than assault. I've been killed by the same three guns so many times that I can recognize the gunfire instantly. What's that? Four Garands around the corner? Time to leave!
It's just exhausting. I want to enjoy the game, and you get fun moments, but it's all ruined by the downright **** bad balance. At this point even Fromsoft is better at game balance, and that's just sad.