If you believe that any ad violates YouTube's policies, here's how you can report it for review using AdWords feedback form: https://goo.gl/UgBa25 . Hope this helps.
Do you’re own work. It used to be YouTube but now it’s “TheyTube” if your platform was still for the creators we would be more inclined to report stuff. We’ve had a LONG history of reporting things and nothing gets done. Example: The YouTuber LispyLeaf. Case and Point