>>1521268The biggest mistake I see autistic people make is making every conversation a monologue about their hobby or interest. No one wants to hear you ramble on ceaselessly. If you make the least bit of effort to hold a conversation and at least pretend to be interested in what the other person has to say, people will generally have a good opinion about you in social settings, all other things being equal.
A closely related trait is holding people hostage by treating them to your controversial political or religious opinions completely unprompted. No one wants to hear about how great you are and how dumb everyone else is because you are a Christian/atheist/conservative/liberal.
Finally, flexing and bragging is really annoying, even if the things you have to flex about are genuine accomplishments. People will like you better if you make them look good or feel valued rather than just pumping yourself up--I mean this in the sense of genuinely being polite and complimentary, not in the sense of phony flattery. No one needs to hear your list of accomplishments--if they are truly worthy, you should be able to derive satisfaction merely by reflecting on them.