I'm willing to give larian a bit of grace for this, because as someone who spent a long time playing Bards, I also spent a lot of that time thinking about phrases for vicious mockery and hideous laughter. I'm not a stand-up comedian or experienced stage improvisor, so it wasn't easy.
It looks like they just went to a shakespearean insult generator (yes, they are a thing), and hit mass generate.
And I'm okay with that, wish I had though of it back when i was playing my Bards.