Sorry, I had the impression that my posts were more helpful than unhelpful because my karma balance is above zero.

I'm not confident I'm interpreting karma right however since I rarely see upvoted posts but see many downvoted posts.

There is also evidence suggesting I am misinterpreting karma and that it is around zero:

don't know exactly who you're supposed to persuade, but your track record so far on LessWrong shows that you barely manage to break even with your karma, and that you lack the level of self-awareness of a socially well-adapted person. Whoever you successfully persuade would have to be even more oblivious than you, which is saying something.

Edit: also funny hearing this from you Lumifer. You're a very prolific poster and most of your content isn't probably the kind of information others are looking for. But extension of your logic, why don't you boo people who speak different languages, or people selling goods you don't want to buy yourself?