you're pretty much making my argument for me about why there was no injustice. it's ok if you play badly, everyone does from time to time, but to act like you deserved the win is delusional and classless.
i'm not trying to ride your ass, but dude, you complain like this after seemingly every loss. yeah, jirachi was hard to play around. so don't risk garchomp, especially when it's your answer to his lop. take some responsibility for your losses and you'll actually improve as a player...