Hi Redmon and welcome! You are in the right place. Lots of us here have been through similar situations and all of us have experienced life with someone with a mental illness.
I'm sorry you've had to go through three decades worth of the above. I am so glad you have found us here and finally have a place to vent.
I suggest you start by looking at the skills workshops on the right

and posting on other threads to gain context and support on your own.
Have you opened up to any of
your friends and family about the situation? Or is this the first time you've spoken to someone else about it?
Sending you strength,
RolandOfEld