~やがる (derogatory auxiliary)

Every last one of them does nothing but complain.

Dammit, that bastard Nagisa really went and ratted me out to the teacher.

You used to be flat-chested, and now somehow you've gotten this big — damn it.

And on top of that, this woman had the nerve to order a kaedama twice.

This guy was my partner just a minute ago, and he's already switched sides, damn it.

You're taking advantage of being near her to get all clingy!!

Damn, he just ignored me.