Yeah that whole stretch was tough. Dude saw Goku was still nice when he flexed on that light eating monster, decided to sacrifice his morals and let that hairy blob Babadi mind control him, killed random people to get Goku to run the ones with him, cheap shotted Goku when he saw that he wasn't putting his all in the fight, took on this new pink blob thing in Buu, saw that he stood no chance and decided to blow himself up trying to save face.
Dude goes to King Yemma and sees not only that Buu shrugged that shyt off, but then watches Goku run the ones with Buu in a brand new even more powerful form, making his entire goal for the last 10 years of his life (and especially the last few hours) seem like a joke (it is).
Absolute nasty work