I am through
You say this when you're so sick of someone's crap that you're ready to punch them in the face. They’re always messing up, lying, and going back and forth like a broken light switch. You’ve given them every chance, and they keep blowing it.
'I’m through with you. You’re like a broken toaster, no matter how many times I plug you in, you don’t work.'
'I’m through. You’re the worst friend ever. You’re like a bad cup of coffee, bitter and burnt.'
'I’m through with you. You’re like a dog that keeps barking at nothing. Just shut up and leave me alone.'