I asked this question at “Blender Artists” and someone found one of my mistakes, as you said, there was a dependency cycle on two of my bones (“Shin_02_tweak” and “MCH_Shin_02_tweak” bones),
I fixed it and also changed the space from “local” to “world” on the first constraint, and it fixed my bad deformation issue,
But the rig’s main problem still exists: the foot roll doesn’t function the way it should.
BTW I appreciate your taking the time
