I listen to a weird combination of music. Half my listening is metal and the other half is bluegrass/jam kind of stuff. Google apparently knows very little about either genre, and so it suggests random nonsense under the Related section. I don't listen to Avenged Sevenfold but I could see it recommending it based on some of the prog metal I listen to, but it's obviously not related to Arkansauce.
Most people I know who have any trouble tolerating advertisement use Newpipe. I don't understand how the official Youtube client is even relevant anymore.