I'll clarify I don't think he actually is; just that Ten thinks it.

Yeah, he does. And that’s infuriating and pitiful, both at the same time.

And while he'd use any reason to justify it, it basically comes down to the fact he is full of self-loathing.

The self-loathing is pretty obvious, isn’t it? Has been since Nine. And I’m wondering what on earth could ever get him to even start to heal from that.