"The only thing I regret is when I get into pointless arguments, usually when I feel that my comment was misunderstood or misinterpreted."

I like that you try to learn from bad arguments, but don't forget, that many misunderstand on purpose, to "win" an argument. Or at least to score cheap karma points or virtual karma points from the audience. So there one can only learn to make arguments in a way that they are harder to be intentionally missunderstood, but those ain't truthfinding skills, they are debate technics.

On the other hand many people post wrong things, are corrected, and then get defensive telling they were misunderstood and use gymnastics to say they were actually correct and the other is a troll

Yeah, man misunderstand comments, that is true.

But many people of the Internet are also unable to make a logic argument and explaining the conflict they just said leads nowhere. One of them often gets down voted to hell and half the time it's not the person who said the stupid thing.

I left reddit exactly because of this, but I also find that somewhat on HN. Most comments I start typing I actually discard and move on because I can smell it already.

Simple rule:

If I'm still in the argument, it's not pointless.

If it's pointless, I am not arguing.

My FUTURE self might think it was pointless. But it can get stuffed...