I'm going to cut off people from my life for triggering my ptsd
In what way did they trigger your PTSD?
They remind me of the trauma I endured.
If people are purposefully trying to trigger your PTSD then you should cut them off. If they aren't doing it on purpose you should talk to them about it. Most reasonable people will change.
I don't want to talk to them. I just want them off my back.
Well then you should just stop talking to them I think. It's important that you're trying to look out for your mental health.