My boyfriend is always saying to me every time we argue that he can do better then me and he deserves better then me? ?

Been together 4 years and basically Everyone we fight be says very nasty stuff but these days it's a regular thing His saying that he deserves better then me and can do better then me. I love him but he keeps saying this to me... I wait til he says it again without him Showing any remorse or attempts to show me any differently.
My boyfriend is always saying to me every time we argue that he can do better then me and he deserves better then me? ?
Post Opinion