Its really those recommendation algorithms, content curation algorithms and even ads that get some people to think that anyone they want to talk to on the internet is a opportunistic bot.
And I don't blame them. If I subjected myself to that nonsense I'd start getting more misanthropic, too. Hell, I figured out years ago that if my primary form of engagement on a platform is blocking people I've decided are bozos, it's time to nuke my account.