> 'adversarial tenant/landlord' is that the theory doesn't line up with reality

So disconnected from reality that it beggars belief.

Anytime you put two or more adult people into a relationship together and at least one person feels like they do not have the option to leave if things get bad (e.g. landlord feels like the tenant is wrecking the property but has no right to evict, tenant feels like landlord is not taking care of maintenance but feels pressured to stay due to artificially low rent), the result is toxic suffering.