I thought I'd drop it in because I did have the 'oh my god, other people aren't the problem, I'm just an arrogant asshole!' moment in my 20s, but assuming my intellect was a non-factor in my ability to connect with others had its own problems. I corrected too far in the other direction ("stop thinking you're special/smarter than everyone else, that's just your arrogance talking") and it made me depressed because when I disagreed with most people around me/wanted different things, I assumed it was because I was the problem (as opposed to others).

It turns out none of us are a problem. We're just different.