There is always going to be an adversarial relationship between landlords and renters. Make no mistake: that we allow this to happen is state violence. Why? Because we are allowing individuals and corporations to deny housing to people by raising prices to make it unaffordable. We even allow them to collude [1].
The only solution to this that demonstrably works is for the state to provide a significant amount of housing to keep the private secotr honest [2].
Everything else is just propping a system that steals from the poor to give to the already rich.
[1]: https://www.justice.gov/archives/opa/pr/justice-department-s...