I'd have to see specific examples to comment on downvotes, but all of these posts were so bad (for HN) that they were either correctly downvoted or should have been:

https://news.ycombinator.com/item?id=31653202

https://news.ycombinator.com/item?id=31653185

https://news.ycombinator.com/item?id=31604333

https://news.ycombinator.com/item?id=31514418

https://news.ycombinator.com/item?id=31514404

https://news.ycombinator.com/item?id=31514385

That should be obvious from https://news.ycombinator.com/newsguidelines.html!