> I def. stopped paying my rent a few times until my landlord fixed their shit

In most municipalities, this is OK so long as the thing that needs to be fixed is a habitability issue. Heat, water, etc

> One day he showed up at my place (with soup who was coming to fix something) and tried to enter. I told him to stay out.

??? You wouldn't let him solve the issue you stopped paying for? How do you justify that?