I don't get the "creepy" vibe that others have gotten off this, but rather more of a "desperate" vibe (as in despair, not clinging). I see it as, the guy did everything he could to build her up, and help her to be a better version of herself than the one he initially met, because he saw the potential in her. And when she awoke to this potential in herself, she thought that she wouldn't need him anymore, that she's outgrown him. He's in despair, because he's just as in love with her as he's ever been, and so he throws out this obviously idle threat about knocking her back down to where she was, hoping she'll realize that he can still help her. But she's obstinate and has grown to be full-of-herself, and stubbornly refuses to hear him out, into what will likely be a Pyrrhic victory. At which point, all he could hope for is that she encounters this same cold realization, and wakes up and comes back to him.
I don't get the "creepy" vibe that others have gotten off this, but rather more of a "desperate" vibe (as in despair, not clinging). I see it as, the guy did everything he could to build her up, and help her to be a better version of herself than the one he initially met, because he saw the potential in her. And when she awoke to this potential in herself, she thought that she wouldn't need him anymore, that she's outgrown him. He's in despair, because he's just as in love with her as he's ever been, and so he throws out this obviously idle threat about knocking her back down to where she was, hoping she'll realize that he can still help her. But she's obstinate and has grown to be full-of-herself, and stubbornly refuses to hear him out, into what will likely be a Pyrrhic victory. At which point, all he could hope for is that she encounters this same cold realization, and wakes up and comes back to him.
You might be able to infer that I can relate.