I feel exactly the same about the assignments being absurd. And these assignments are not any ultimate level assignments, those are early stage assignments made impossible to reach for 90% of players. I don't know what they were thinking when creating those, maybe nothing.
One of the worst assignments is to get the next shotgun that should be available by leveling up, not by impossible assignment: Get 25 kills in a round with shotgun and get 5 kills without reloading. What? You're having max 7 round magazine. And thinking the current state of shotgun, it is impossible. Shotgun is just useless at the moment.
Then there are those assignments of x amount of multikills required to get some weapons, like smg, lmg and assault rifle.
Just stupidity and very frustrating.