If caught out of clean water, I think carp are very tasty. I’ve caught dozens of them using whole kernel corn as a bait. You’ve got to navigate those little cross hatch bones,but I think they are way underrated as a food fish in the US.
I’ve never had carp personally, but I do know from where you speak - water temperature and clarity can make a huge difference in how fish tastes. Anyone who’s eaten catfish caught from a warm, muddy reservoir knows it is decidedly different from the white, farm-raised stuff. And not for the better, I might add - oily (almost waxy) yellowish meat that tastes for all the world like the dirty brown water where it lived. I’m not crazy about catfish anyway, but that stuff is dreadful.