:D Well just do co-op when you have buddies on ^^ It's far more enjoyable that way, and you don't have to feel like your a "let down". Goob ;/
And hey! worst comes to worst, you can play a spec ops :) Not giving people ammo? It's cuz your helping them kill enemies! Giving too much ammo, not killing mobs? It's cuz your benefiting your team! :D It's a pretty chill job.
From 0 to KICKASS in .stupid seconds.