Jacko doesn't like any of my significant others either. She seemed ok on my last boyfriend (probably because he was utterly terrified of that beak and didn't put any pressure on her and let her eat out of the sunflower seed bag at will n poop on him at leisure). As for my current lover---they have an... interesting dynamic. She is more defensive and cheeky with him (because he tries to be 'the boss'

and she knows that he's closer to me i.e. more competition).
She struck out at his thin pyjama-covered butt a few days ago because he got too close to me and her bowl of mash

I warned him not to get between me and her...and she's juuuust missed
I tried really hard not to laugh. She bopped him in the forehead once too---again his own stupidity. Generally speaking as long as he doesn't try to remove her from me, or move to quickly though she's ok with him. However she's not nearly as willing to behave for him as me.
As much as I understand your boyfriend's anger, he really needs to remember this is a strange cross of a wild animal and a toddler---he *needs* to be paying attention to body language and supervising. There could be something in his energy too....I have certain friends that Jacko loves...and one of my friends in particular she is very docile with...and then certain friends she is very antagonistic towards.