I think broken condom just he doesn’t want to get pregnant, and he have the reaction maybe typical “I don’t want to look down by Alpha, I can endure it”. During heat cycles also caused pregnancy easy so he trying to avoid getting pregnant possible since he always appear on public it will be troublesome.
During that condom scene, he mentioned another alpha. He's had experience with someone else before, since he also said "it's been so long since I've had this" kind of thing. He must've been abused/threatened dby an alpha in the past and it's still hard for him to trust someone new with something so personal.
I need to know what past trauma is triggering his reactions, first the broken condom, now this… That alpha cutiepie has no bad intentions, but obviously the omega just reacts badly bc of the situation.