After practice, I started being naturally quick at taking negative-constructive feedback due to always being able to drastically improve by doing so, plus gaining respect from whoever brought it up, who in turn kept on bringing constructive feedback, and so on. So the cycle self-stimulanted after kickoff in all senses. It's 100% win-win.

Other than that, negative feedback that says nothing can't but be discarded. Negative feedback on compromise solutions are unavoidable observations that I either try to clarify upfront or take note of if I hadn't detected them before.