I may have missed something but this sounds like you still have PMR, and that may be the primarily cause of your existing issues and not steroid withdrawal. One major factor is that the CRP is still reasonably high and in the absence of any other sources of inflammation, then that is a good indicator that PMR is still very much active. If that is the case then you are effectively managing your PMR symptoms without the benefit of prednisone, which is certainly challenging but some people choose that path.

The taper you have undertaken was exceedingly fast and I am wondering what advice you received that your
PMR had ceased and prednisone was no longer needed. As others have mentioned, the steroids don't cure the inflammation caused by PMR they just reduce the symptoms. If the PMR hasn't burnt itself out then removing the steroids will lead to the inflammation, pain, lethargy etc building up again over a fairly short period of time.