I didn't downvote and it's not the guidelines[0] but generally hackernews doesn't look kindly upon witty or funny replies and tends to emphasize replies that add spread knowledge and encourage discussion.

TIL the guidelines also say:

> Please don't comment about the voting on comments. It never does any good, and it makes boring reading.

[0] https://news.ycombinator.com/newsguidelines.html