Also, I do think the avoidance behavior can be an issue (not just about TS or posing style, but a lot of things). IME though like...a lot of people in general are like that except (well, maybe even if!) when they are FB keyboard warrioring or whatever.
Many people will /not/ speak up and ask for what they want. I understand this, because if they do they will have to worry about someone bitching about them being a snowflake, or having no IC/OOC boundaries, not being a hard core RPer, whatever. Many people will not check in or ask (or tell others that they enjoy feedback) for feedback or what the other person because they don't want to come across as suspicious or creepy or like they're too dumb to figure it out.
A lot of upset feelings that I have had to referee as a staff member or work out in groups has at its root that someone didn't get something that they needed/wanted, that they thought they'd dropped enough hints, and they are now hurt that they weren't picked up and run with--but they might well have gotten really angry at people for asking outright and putting them on the spot too.
This isn't some horrible awful OMG MUSHERS ARE THE WORST EVARRRRRRRR thing. I can say the same for the various conflicts I got to unravel and deal with when I was in PTA both at the program level and at the district/state level. HR people get to deal with this at workplaces large and small. Or any nonprofit too.
I don't know what it is about people (though also, the demographics of the groups I've personally worked with have SOME diversity as far as ex-pat/race/culture/personality/gender ect but they're all pretty much white American majority, so I would be super interested to know if it's significantly different say in orgs outside of that) but at least almost universally in RL and otherwise many folks find it super hard to ask for what they want out of a situation or proactively state boundaries. It's really fucking awkward sometimes even if you have a lot of practice. So honestly, I try to give a lot of grace, especially online with people I don't know. Everyone has their own thresholds of what's intolerable, though. It's easy for me personally to say "roll with it what's the big deal" about a lot of stuff, as I would imagine that others could say the same about my peeves.