You fell for the Gambler's Fallacy, unfortunately. You think that if you open enough, or because you spend enough to support the system that you deserve to win or that you're guaranteed to win. There's nothing wrong with playing the boxes if you understand that the odds don't favor you, but having the expectations that you're entitled to win is just bad reasoning. "The house always wins", otherwise the house couldn't stay in business.
In the future what you should do is buy a few boxes for kicks if you're in the mood, know that you probably won't win, then buy what you want off the MP. Otherwise, you need to do what you did with the wings and buy however many boxes you need to get it with coupons, and then consider getting the item before then a bonus.
Lastly, it sucks that they get people like this because clearly it's actually had a pretty detrimental effect on you. Systems like this aren't very kind.
i didnt wanted to sound like because i supported i should get what i wanted it not my point. its just...400 packs and no wings, 60 now and no pet...theres got to be something wrong with my odds or i'm the unluckyest person in the game.