I quit!
我不干了！
Fuck this!
去他妈的！
Screw this!
管他的！去他的！
This is bull/dog shit!
什么狗屁！
This is crap.
狗屁！

I've had enough!
我受够了！
I've had enough of this nonsense.
我已经受够了这些废话。
Well, that's it for me!
够了！
Well, that's it for me, I'm leaving!
够了！我要走了！
I'm out!
我不干了！