At least the other villians were having fun during their part.
Dio was grinning every time he was cooking up any Joestar, that was really his specialty.
Kars was having fun playing his Lisa Lisa guitar and being the ultimate lifeform.
Kira was just chilling in the sun with his hand, dude was really living that quiet life.
Pucci was celebrating by listening to music and counting prime numbers.
Doppio was probably smiling a bunch of times, but I can only remember that Diavolo was just mean mugging everyone, it didn’t matter whether he won something or not. There was no joy in this dude. Even King Crimson is furious, and I can probably understand why. If I knew that my part didn’t heavily involve his majesty, Jotaro Kujo, I’d be pretty mad too.