DAE hate this game but keep playing anyway?

I get so angry at this game that every other week, it seems like I just want to uninstall and never play again. For example, I got so angry one time, I just kept queuing for ranked games then leaving during the champion select screen to tank my rating from 1160 to 800.

I keep coming back because my friends play, however, they never want to duo queue with me for ranked games because I'm a lower rating than they are (even though I tanked myself on purpose) and also because I'm a rager. Is there some sort of secret to enjoying this game even when you lose repeatedly or do I just have the wrong personality for this game?