Passive aggressive behaviour with board posts - are they really any better?

So I got into an argument with this guy who was living in another world entirely, and continuously pretended to be informed by making factually sound statements completely unrelated to the topic.

Unfortunately when I called him out on it he continued to make those points and undermined my side and I lost my temper. Afterwards he claimed that I was egotistical, and did nothing but put himself on a moral high ground as if he never at any point made any condescending or 'uneducated' comments.

Then, he created a board post in an attempt to passive aggressively shame my response, acting as if I didn't try to tell him that his point was unrelated less forcefully at first.

It may seem as if I'm doing this too, and I might to some degree, but unlike his post which has been addressed multiple times, this behaviour has rarely been called out.

While it is my fault for letting him get to me with his extremely condescending and hypocritical behaviour, it's not right to claim the community is bad while acting like they aren't even part of the problem in the first place.

And it's definitely not right to make a board post over a subject that has already been discussed thoroughly for the sake of hurting people's feelings and shaming them through the undertones and references inside, even if it doesn't mention their name. If it were some form of harassment (threatening IRL, passive aggressive behaviour, threatening to feed next time they meet in game, bribing for upvotes, etc) that wasn't discussed often it would be more than fine, but a topic on people just being bad in general calls for nothing but circle jerks and witch hunts. At least new and controversial subjects spark discussion and bring awareness.

As someone who's part of the problem (and to be fair all communities are toxic to a degree), acting as if you're perfect doesn't make anything better unless you're looking to farm upvotes.

I'm tired of having to deal with these kinds of people. I'd rather deal with someone who'd tell me to kill myself constantly but at least admits he's the reason this community is toxic. Awareness is the first step to the solution.