People sell houses and move to other places all the time, even if they move to a rental. Couples divorce and manage to change their living situations. I understand that financial considerations can drive decision-making, but I don't see how anything can't be changed. There may be financial consequences you don't want to suffer, but in an objective sense you could make a different choice.

But back to the original topic, if you are unwilling to change what sounds like a negative living situation, then figuring out how to stop reacting in fear whenever they argue is a more important issue. You can't stick your head under a blanket for the rest of your life anytime you are in the proximity of conflict. Learning how to deal with conflict and not be scared of it sounds like it would really help you. Dwelling on a note you wrote to your T sounds unlikely to.