inu-kun said:
Maybe I watch too much anime so I'm ingrained with the idea of social services being completely useless.
They aren't useless so much as restrained by the law and the reality of the situation. You can't remove someone's kid just because they're an ass, because all that's going to happen to that kid is that they will be taken away from the only environment they know and put in care, which is also a bad environment. The outcomes of long term care are not great for kids who go through it (although some of that may be due to the abuse which put them in care).
There's a certain perspective here which I can understand you not having if you grew up in a good home. Like, what's happening in this video is emotionally abusive, but there are things which are worse, so much worse, than emotional abuse, and child protection services see those things all the time. The fact that they've gone through an inspection and "passed" may seem bad to you, but it means that if the kid ends up in hospital or comes into school with bruises people are going to ask questions, and those questions could save his life. The stakes and standards child protection services have to work with are different to yours, because compared to the kinds of things they have to deal with this is.. well.. it's not the worst.
But again, that doesn't mean it's not important to report this kind of emotional neglect when you see it, because even if it's unlikely to result in action on its own, it can help to identify children who are at risk of more serious abuse and build up a body of evidence if it ever does escalate.