I think in FUBAR it's a little too hard, because if you have to get ammo or repair something and you're behind, lets say, a car, the soldiers can shoot through it , but you can't. So, you're just sitting there getting shot to death. I just think the soldiers shouldn't be able to shoot through the cars
after lvl 22 every building needs alot of copper to build and it gets anoying because you usually cant find it, and building it takes a while the amount of copper need to build som buildings shouldnt be that high either.
fubar is the hardest mode for sure