I've never seen someone say this once. I've seen people call lanes but never "Or I'll feed!" or anything along those lines. Perhaps I'm just lucky.
Regardless, I just make it my priority to main support and jungler. Jungler is basically the team captian, if you're looking to force a 20min GG Jungler is your man. He controls the entire game. A vastly underrated role. AD Carry, probably the most overrated role in the game is your striker, important but uselss alone. AP Carry? I dunno, Wing or something.
Support though. Support's your god**** goalie. True you can't "Carry" your the game like the striker can, but what you can do is amazing.
Support is second only to jungler in Map control.
Often has some of the best counter innitiate/disengage in the game (Lulu, Janna, Alastair, reversed on Blitz)
You stop that god**** ball from getting in the god**** net, while screaming at your screen and flexing your (obviously giant) muscles. Support is the MAN ROLE for MANLY MEN. Saving that ******* who was out of position cause he's a ****ing ****** and then turning an entire teamfight on it's head and getting an ace! MANLY PLAYS FOR MEN.
You will never ever get thanked or cheered as support. Even when you save the idiot mid from dying by a sliver of health with your Wish. Even when you Flash Heal/Shield and just barely save someone. But that's fine. You don't need thanks. You did your job. You're a credit to the team.
A good support destroys your opponents bot lane and, well sets your striker up to score. You don't need to be much good to right click afterall.