I'm fairly certain anyone can request an Esquire title but the general rule is that its reserved for lawfags, of which Ralph never attended law school so that's bunk. His debt is roughly ~50k USD, so I imagine it was probably a private university or state school like whatever Virginia will afford him. That's all fine and fair; a lot of PoliScis end up going into Business Admin or Finance because the degree is worthless unless they want to teach a high school history course or something. Ralph chose none of these things and instead went with streaming (in part because of his felony conviction).
It doesn't matter much on the surface anyway. He won't pay any of that money back. It's why he secretly likes Biden because student loan forgiveness, that sort of shit.