March 2020 is when the pandemic started. So you moved out sometime before then, and hired this property manager. Maybe they used the pandemic as their reason for being behind on rent initially? I am curious, how long were your original tenants in the house and how long was their lease, since March 2020? Maybe this was the plan all along for the property manager, maybe the original tenants left because they weren't doing their job...

Good luck. That's crazy.