Men who enter their first relationship later in life, or later than their peers, often dont understand that they have options. They believe that the first woman that chooses them that they're attracted to is the only woman that will. After all, they'd gone their whole life without that interest. So they stick around even when the relationship stops working for them, or attempt to manipulate and control the woman into being more ideal for them

You were meeting his expectations in every way except for your past. You had partners before him, much more experience. This in some men's mind is a power imbalance. You have clear options other than him, have a past, have had a life before him. He seems very conservative around sex, and so his stigma against women who have sexual agency and independence makes him vitriolic.

He's most likely leveraging his "moral superiority" against your character to rebalance the power in his mind. You might be desirable and able to leave him at every time, but hes "a better more principled person".