the.com/flak

means Harsh, repeated criticism or backlash aimed at someone, usually for a decision or action they've taken.

from Flak is a German acronym — Fliegerabwehrkanone, literally 'flyer-defense-cannon,' the anti-aircraft guns that threw exploding shells at bomber crews in World War II. Airmen who flew through that bursting, deafening barrage and lived carried the word home with them, and by the mid-20th century English speakers had repurposed it for the verbal kind of barrage — the exploding criticism you catch after making an unpopular call.