^^ that would be my darkest nightmare.
I play the hell outta some League, I'm Silver V in this season, which ain't bad by my standards (I hadn't even played ranked until this year) but I've been playing for around 2 years or so. I've been trying my best to be good at all roles, not just one or two, and I gotta say I've shown marked improvement in how I handle losing. I mean I never raged before, I don't really rage about anything anyway, but now I can really focus on what I did wrong and improve.
It's as they say: the team that makes the least mistakes wins, I figure. Current favorite champion is Ashe, got that ADC on lock!