Why the heck do I have minus points on HN?

"How is a user's karma calculated?

Roughly, the number of upvotes on their posts minus the number of downvotes. These don't match up exactly. Some votes are dropped by anti-abuse software."

Source: https://news.ycombinator.com/newsfaq.html

I have the feeling HN is not very newcomer friendly. I did not post any shit and got a lot of downvotes

it means you have been downvoted a number of times

Now flagged? Why?