It seems easier to believe that landlords are oppressive of their tenants, BUT JUST AS SOME TENANTS HAVE BEEN AT THE MERCY OF THEIR LANDLORDS, SOME LANDLORDS HAVE BEEN TREATED WITH CONTEMPT BY THEIR TENANTS (refusing to pay rents or other bills as at when due, doing harm to the properties, stirring up avoidable conflicts amongst co-tenants, refusing even the most reasonable rent reviews, causing pollution to the premises, etc).
Usually, such landlords desperately need to evict such tenants. There is however, the Rule of Law and the landlord needs to comply with the applicable law, so as not to be at the wrong side. First, he needs to give the due Notices and proceed to litigation, if the tenant remains in possession beyond the expiration of respective notices.
If the bone of contention is the FAILURE TO PAY RENT OR OTHER CHARGES, THEN I WOULD RATHER HANDLE THE DEFAULTING TENANT AS I WOULD HANDLE A DEBTOR, BECAUSE HE IS INDEED IN DEBT TO THE EXTENT OF THE RENT, and WHICH IS DUE. Debt Recovery Agents are not doing what diligent Rent Recovery Agents cannot do, SUCH TENANTS CAN BE WRESTLED TO COMPLIANCE.
Sometime, an element of crime is involved. It could be that the tenant assaults the landlord or his agent or is in any way engaged in any criminal conduct. That complicates the matter for such tenant and he thereby drags himself into a deeper arena of conflict that the landlord or his agent can explore.