Here's me advice: the op clearly stated he knew he should "work on" things.

What he didn't state is he queued up for something knowing full well he is subpar at his chosen role.

"Work on" things when other people don't need to carry you. Read your tooltips. Randoms aren't obligated to carry you, even if courtesy requires them to be nice when telling you you're incompetent.

You are, however, required by simple courtesy to play your role at an adequate level. If you can't or refuse to do that, you only have yourself to blame when people want to kick you.