I feel so bad for mock and get where you're coming from but that doesn't change the fact he's indeed pathetic and it's getting tiring as we are only getting one side pov so the frustration of readers is understandable. I am not vouching for Nanjo either, no one in this story is actually likable, but in real life these stalker behaviour would be scary. He has full right to not reciprocate the same feelings(even with everything that happened)
Also the self harm part got overshadowed by what happened next. And everyone just forgot about it.
But there is no reason for you to come for anyone on personal level.

He's so pathetic