I wouldn't say "targeted" as such. We all accept that if we make a public comment then others are entitled to address it.
If someone repeatedly makes comments that others disagree with then it may seem like they're being got at, but it isn't personal.
Though good-natured banter can sometimes be difficult to identify, most of us have been on here long enough for our own posting styles to be understood and I think it only rarely spills over into genuine hostility.
Sometimes I will stay off for a while after a bad performance just because constant recrimination isn't my thing and I don't want to be drawn into it.
To be serious for a moment - perhaps constant complaining triggers some things from the past that I'd rather not revisit.
When it comes to bad performances, I get disappointed but I rarely get angry - I think that's the difference. I don't take it as a personal insult from the players. The only thing that does rile me is when someone is clearly not making the effort.