At the end of the day if you do genuinely come across as a loser… well all that has happened is a stranger thought you were kind of a loser. That doesn’t actually matter much at the end of the day. We’re all kinda awkward sometimes; some of us much more often than others, and sometimes it’s because of autism or similar, but in a random small talk interaction you can at least take comfort in that you’ve not hurt anyone or damaged anything, you just had a somewhat bad short conversation