The best part is that it isn't that he thought he could do better with a white woman, he thought that Nora, who was way out of his league, wouldn't find out about him having sex with black whores, and if she did find out, that she would be okay with it.
She wasn't, of course, and the next thing Ralph knows he's getting divorced, so he rebounds onto Ade (yuck), and then he dropped her for Faith, before fucking things over with Faith by trying to be Lil' Dick Molesterson with the throuple obsession with Meigh and Faith, before his abuse and Faith's refusal to join a polyamorous relationship left him stuck with Meigh, who he never really liked beyond the fact that she was willing to suck his dick clean after he pulled it out of Faith's ass.