I'm not even sure it is bad policies. I am pretty sure that they just don't have moderators.
I doubt anyone reads 99.9% of reports.
So you get bigotry and hate, you get insane and deadly DIYs, you get 12yo girls being creeped while posting random 5s clips from their lives.
Not to mention just the vast amount of extraordinarily low-quality content YouTube serves up. It's amazing how bad a lot of the videos it thinks you will like are. The algorithm makes no sense.
But hey, here's 16 different Joe Rogan clips with sigma male music in the background.