Please don't ever be this person in ranked.
Please.
Please.
It happens lmao
I'm the same way. I feel like I always end up feeding or doing something wrong if I don't support. Sometimes I play other lanes well, but I'm so far out of my comfort zone that I still feel like I'm playing poorly.
It's some sort of evil mentality that is hard to break out of.
I feel its important to know every role at least well enough that you can preform decently, even if it isn't your best role. The role I tend to struggle with most is jungling, but I can still do well enough that I don't fall behind massively.
My best role is mid, but I'm at least competent at everything else (I find it really helps to pick between 1 and 3 champs for each role and just specialize in using them; its alot easier to learn a few specific champs, than it is to learn multiple for every role.)
Ironically that game ended in a hulk smash.