The leverage you have with them is via state insurance commission, their title insurer, if they have a n attorney on staff the bar and if they have something like a state attorney grievance commission.

My understanding is that you have to be a licensed realtor or appraiser in order to "represent" someone else for the tax grievance process.

The tenant will use a range of emotive strategies, raise all of their grievances, etc.

You both decided to air your grievances on this post when if you felt it bothered you so much, perhaps you should have passed it up. 

Small ones ( 10 units or fewer) are notorious for infighting, mutually destructive behavior, petty grievances, illegal maneuvering, etc.I have had investment experience in all types of condos.  

But is this tension due to grievances concerning economics or government corruption?

You can get some comps and compare your assessment to those properties and use the local grievance process if the numbers don't make sense.

@Jefferson Smith, I would make an immediate grievance file against him since he is a licensed realtor. 

I would like to clarify for anyone researching this firm or reading the grievances of current OCPM clients (myself included): At the time of my property purchase and contract entry with OCPM (August 2019), they had great reviews and feedback, according to my research and conversations with peers.

Withhold the rent, go to court and duke it out, be damned sure your lease is not getting renewed.But the LL may not be stupid about this and acknowledge your legitimate grievance, and make amends, and the relationship may not suffer irreparable harm.