As for voting patterns, I'm not sure I agree. For example, it's not true that downvotes used to be reserved for something factually incorrect. The voting mechanisms are subject to the same psychology as they always were.
Your comments often argue in edgy ways that are not exactly in keeping with the spirit of this site. From my perspective that's more likely why they're getting downvotes. I took a quick look and your comments that I saw which were upvoted don't seem to have this quality. Usually, when people complain about downvotes, there's something in their comments that they're not aware of, but which is apparent to readers. Of course there are also downvotes simply because of disagreement, but all comments get those, and they usually get fixed by corrective upvotes if there's nothing else in the comment that has a downvoteable quality.
https://news.ycombinator.com/item?id=22256458
https://news.ycombinator.com/item?id=20438487
https://news.ycombinator.com/item?id=15032682
https://news.ycombinator.com/item?id=15307915
https://news.ycombinator.com/item?id=21588105
https://news.ycombinator.com/item?id=21325122
https://news.ycombinator.com/item?id=15546533
https://news.ycombinator.com/user?id=BetterThanSlave
https://news.ycombinator.com/item?id=16397133
https://news.ycombinator.com/item?id=19912334
https://news.ycombinator.com/item?id=20742578
https://news.ycombinator.com/item?id=21803541
https://news.ycombinator.com/item?id=21907232
(sorry...hard to stop)
People also chronically overinterpret whatever they see on HN that they don't like—again, myriads of comments make the opposite generalization to yours. Randomness plus cognitive bias equals narrative.