Noone is forcing you to buy Packs, it's still your decision after all.
If you would be less of a tryhard, you wouldn't critize this much nor would you care, and if you really want to be that much of a tryhard you currently are, you just do missions till you have the $$ you need, and you would be Level 100 by that time too.
Seriously, I don't see why you need to flame/cry/whatever you're doing. You still can refund this app, go and do it if you feel like. You can't expect a game being perfect after the second week it got released, nor can't the staff be.
Of course, I think this is overprized too and Zone might turn into a Fight of the Credit cards, but I don't mind this, I wouldn't even buy that gun if they suddenly lower it. If you're only going to point out the bad factors this game has, then you should refund this app immediately..