I am sorry you had that bad experience. I struggle with ptsd myself and I can get triggered where it takes me time to figure what the trigger was and how it connected to a traumatic experience in my history. I have had to very patient with slowly identifying my triggers. It’s been a lot of work.

Also sometimes if one parent was abusive we may think the other parent was safe. Take one away and one can discover that’s not so much the case. And the parent left can be unhealthy and very triggering. Combine that with the parent aging and getting impatient and it can be very challenging.

It’s very important to have a safe place and demand that not be intruded on. It may be that you may need to have your father live in an assisted living place.