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.
I tried the latest Opera for Android 44 stable (44.1.2246.123029). Unfortunately, I still cannot open web links in associated apps (e.g., YouTube, Google Maps).
If this already worked in the Beta, I really hope that this feature will be added (or the "bug" will be fixed, however you see it) to the stable version in the near future, because I clearly see a case for this one.