Unfortunately it is clear to me that the care of your disease has been well below current and accepted standards.
What you are referring to as Biologics are known as DMARDS. These should be used early in the disease and not late. Even in my time in practice, that was the standard of care. The evidence is overwhelming that they prevent disabling disease.
Further, RA is a multisystem disease and not just a disease of your joints.
I honestly think that if you continue to be symptomatic, which you say you are, then you need further medical advice to receive the
current standard of care.
In any long term serious disease you need to make sure you are receiving current standards of care. Sleeping on a grounded mat is not part of the standard of care for RA.