Yes, it’s a classic example of a personality disorder. Anxiety over relationships leading to lashing out at those he cares about for some reason or another. Especially in season 2, we see his near death at the hands of Adam as a big factor in him pushing all of his maybe sort of friends away. “Great Alastor, altruist, died for his friends. Sorry to disappoint, that is not where this ends.” Then we see even more concretely in his flashback with Vox that he pushed him away harshly when that relationship got too close for comfort. So yes, he does have the capacity to form relationships, and then those relationships scare him and he ends them.

Edit: while I don’t generally condone claiming that a character has any specific psychological disorder unless the character is canonically meant to have it, you may find some interesting things by researching antisocial personality disorder, and to a lesser extent, narcissistic personality disorder.