Thanks for the feedback. The 'You' section begins with what other people are choosing and can be a bit clickbaity until it has a better grasp of your user profile. If you'd like to improve it, give it a bit more info by making some selections and then block the sources you don't like.
If you don't mind me asking, which country are you accessing it from? Also, would you mind giving me some more info on the bad sites you're seeing? Some URLs, screenshots, etc. I may be able to block them if they're causing problems, or at least send this information along as a recommendation to our team.