Channel 4 took the flak from angry viewers protesting about the show.
(often + from)
She got a lot of flak for deserting her children.
(often + for)
get flak
To receive a lot of criticism, judgment, or teasing. Because I'm in a family full of surgeons, I get a lot of flak for my career in the arts.
get/take (the) ˈflak (for something)
(informal) receive severe criticism: He’s taken a lot of flak for his unpopular decisions.Why do I always get the flak when something goes wrong around here?
Flak is bullets from guns on the ground that are shooting at enemy aircraft.