Deleted following OP.
I hope you manage to find a way through this and are able to get some help. My kids are not teenagers yet, but this sort of thing is one of my big worries for the future.
I do not want to criticize OP, because the mental health issues are hard and help is oftentimes next to impossible to get. For all "contact doctor", half of the time you get no help. Even hospitalization can be super hard to get unless the kid clearly suicidal.
But, the idea that taking away PlayStation or severly limiting it, that forcing the kid to push the boundaries is somehow cruel is just wrong.
It's cruel and inhumane to forcibly remove someone's access to something they are personally and emotionally invested in. It's cruel and inhumane to force one's own view of a “good life” on someone who obviously disagrees.
The real challenge of parenting is to find ways to help your child without resorting to cruelty. Your fallacy is to assume that cruelty is necessary and that anyone who criticizes the cruelty must somehow be criticizing the desire to help.
Not always. And not in this case. It is not cruel and may be necessary.
> It's cruel and inhumane to force one's own view of a “good life” on someone who obviously disagrees.
Speaking about fallacies, this framing is clearly not what is going on in that situation. In either way, the kid is growing to be entirely unable to live without caregiver of a sort, so yes, it is duty of parents to intervene regardless of kids agreement.