If you’d paid attention, you’d realize it was much more than mere feedback in his headphones—the show today is from a remote location and the techs completely blew it, they were not prepared to go on the air and nothing was working, callers weren’t going through, everything crashed and they had to repeatedly go to commercials and reruns. Plus his fans know he blows his stack, that’s the draw.
AFAIK all of his locations are "remote".
It never hurts to have a plan B.
Regardless....trashing your staff, on air, is unprofessional. But, if his fans know, expect and put up with this rude and immature behavior, good for him and them.