sometimes I find a few posts in a row I'm interested in. But many times there is nothing i want to read.
AFAIR, it began some months ago at a certain day. I am serious.
Since then links to mainstream or low quality articles in mainstream media and blog posts have flooded hacker news.
Because other people are interested in different things than you are.
See http://ontology2.com/essays/HackerNewsForHackers/