I'll go with Jiren. Both of these feckers are bland but at no point was Jiren particularly disappointing or pathetic. The bloke wasn't crying in pain every time somebody as relevant as Krillin was dealing a paper cut to him.
Jiren is bland and boring but not shit. Kaido is definitely 100% shit and disappointing.
Jiren is bland and boring but not shit. Kaido is definitely 100% shit and disappointing.