Except for a few obvious spam posts, I’m pretty hard-pressed to think of any specific posts or comments I’ve seen that struck me as bots (although to be fair, I’m there may be some bias due to which communities I choose to follow)

There are, however, plenty of idiots, people who don’t speak fluent English, trolls and other people whose motivations may not be purely good-faith discussion, people who probably have various types of neurodivergence and/or mental health issues

And I could see some of those categories being very easily mistaken as a bot under a lot of circumstances.