There used to be (might still be?) a reddit and a counter subreddit called like "smalldickproblems" (and bigdickproblems). The latter, I'm 99% sure, is a joke one. Unless someone has a giant tripod situation going on, I can't really see that being an issue. And I played enough sports/spent enough time in locker rooms to know that's not the case for the vast majority of men (👀)
The SDP sub was insane though. TMI or whatever, my dick is probably a little on the small side for my height, which is average. I've never lied about my height knowingly. I've never pretended to have a huge cock or whatever. And I've also never had a sexual partner complain about either. Spoiler for younger people who may genuinely not know: your dick size doesn't matter for the purposes of sex and pleasure from sex to... most people.
Basically, guys: stop being weird. Or continue because it makes it super easy for non-weirdos to look good in comparison. (But seriously stop being weird guys)