Quote from Drawmeomg
I'm the worst player on my team as well, by a fairly wide margin - Silver IV player (only Silver tier player) on a Gold III team. It can be pretty harsh - but if they want you to play with them, that's good, right? Also, you're probably playing one role on the ranked team, which gives you an opportunity to learn that role really well against much better competition than usual.
My approach was basically - the role that I play on the team, I main that in solo queue. Because I get to practice it against much higher tier players on a regular basis, I'm much better at it than is implied by my Silver IV ranking. I've fallen out of practice on other roles, so I tend to lose as them (Jax is really strong right now, though!), and sometimes lose when another ADC main lands on my team, but tend to win when I get ADC. Result: I'm a reasonable contributor on my team and stable in solo queue.
This is what I do. I've been maining top as Singed, with a bit of Yorick, and I plan on trying AP/Mpen Mundo for the lulz to see how that works. It just sucks to suck and not feel like you're getting any better. And I know that in Solo Q if I end up being the one to ban we are losing.