The thing about Adam is that he does not have a story. He is a supporting character in Blake's Story. It's about Blake escaping from Adam's control, by recognizing her own inner strength and accepting help from the people who genuinely care about her (In all kinds of ways, be they Platonic, Familial, or romantic).yes, my general point is, that obsessive, possessive and violence is just who Adam is, towards everything. Even you can see that these traits can manifest in multiple different ways, I just never saw a point where Adam was so universally single minded with himself and blake.
Like yeah, a stalker has those traits, but Adam never seemed to manifest them in the way a stalker does, but rather someone who is much more actively malicious, "Join me or die" sorta way. if she didn't join him, she ded, if she runs away, then he goes back to doing his faunas revolution schtick. but this volume he decided to just follow her, and only her, to kill her as his one goal, seemingly with zero support from any of his old contacts. He was reduced down to a single motivating goal and trait, get blake, kill blake. I don't think that was ever his characterization.
Which I think even does the whole abusive ex plotline thing injustice. Just stabbit ded. it's not the most satisfying conclusion anyway to an arc with the concept of "Oh this guy has an obsession with you, and he happens to be overwhelmingly powerful" Which is a horrifying concept when you think about it.
In fact, as a character, adam kinda completely sorta encompasses the concept of the obsessive abuser. someone that's so powerful and vindictive, I think they could have done some very interesting stuff with it, and i think we got hints of that, like when we seen him hanging around outside and it 'seemed' like an illusion. In other words, playing up his more horrifying aspects, almost like a monster would have been a pretty interesting way to go. But even if we believe this is how his character has been since day one, I think what we got was pretty mediocre with a very quick pay off that didn't feel too deserved. at least to me ;p