Should I Quit LoL?

I'm pretty sure that I don't belong playing this game. I put a bunch of time into trying to get better and trying to climb the ladder only to be shit on over and over. And over. And over again. All my friends barely play, yet they climb the ladder with ease. Am I just forever gonna be garbage? If so I want to save myself a portion of my life. I enjoy the game... when I win. When I lose its infuriating. It brings out the absolute worst in me when I lose. It takes everything I have in me to not type in chat.
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