Maybe true, but at a certain point you're just getting angry at the wind for blowing. The system is a scorpion: It cannot, will not go against its nature.
They are a political force, not a force of nature. It is certainly reasonable to get angry at a political force even if their politics are predictable.
Yes, this is why the slogan was "Abolish the Police". The replacement "Defund the Police" was entirely astroturfed by Democratic politicians who thought it was better optics (it wasn't).
I don't think he's throwing his hands up in the air, rather he's implying we need more radical change. If we're going to be waiting around for police to become "good", that's not going to happen. We need to force them to become good.