I genuinely hate the interns in Seasons 4-5. They were annoying as hell and MAGIC having their own interns felt like a failed experiment
MAGIC were a mess as interns too but I don't remember Meredith Cristina Izzie George or even Alex being this bad with actual patients.
The Dave face transplant episode is probably the best example. They're calling this man "Blowhole" and then making jokes about it RIGHT IN FRONT OF HIM. Izzie literally has to tell one of them "Don't talk anymore. Ever." and somehow that still doesn't get through to them because they do it again later.
I also loved Izzie standing up for Lexie when Mark picked her for the surgery and the other interns immediately started saying she only got picked because she was sleeping with him. Izzie telling them to shut their mouths was so satisfying.
And I know the show even points out that MAGIC were a disaster too when they were interns. I'm not saying they were model interns. But there's something especially nasty about mocking a patient with a severely disfigured face while he's right there listening to you.
The only time I can remember one of MAGIC doing something similar was Alex in early Season 1 making fun of Annie Connors and calling her lazy for letting her tumor get that big. And Alex was deliberately written as an asshole at that point.
These interns were ridiculous. I have no idea how half of them even got into Seattle Grace and I was so glad whenever Izzie got sick of their shit.
And I was VERY glad we basically never had to see any of them again after Season 5. I did not miss them at all.