Absolutely disgusting. I'll give you a half-pass if all you've heard is Nostalgia, Ultra, but even half of that was him going over other people's jams. When he was left to his own devices he put out perhaps one of the most boring debut albums ever. It's like the entire budget went into Pyramids and then he threw some shitty Lonny Breaux grade stuff onto there. For someone that's a pretty good writer he has a pretty hard time making good songs while Abel is out here "making the same song over and over again" yet still being so much more interesting every time than Frank making a different, forgettable song over and over again.
Its extra sus when the notion is more than just him being perceived as a better singer too.