Your quotes say the
opposite of what you claim:
Pound and Rebka ... confirmed that the predictions of general relativity were borne out at the 10% level. This was later improved to better than the 1% level by Pound and Snider.
hyperphysics.phy-astr.gsu.edu/hbase/relativ/gratim.html
www.logosjournal.com/issue_4.3/smolin.htm
Lee Smolin: "he identified two existing theories of principle: the laws of motion set out by Galileo and Newton, and thermodynamics. The basic principle of the first is the relativity of uniform motion, that the speed of your own motion is impossible to detect. Einstein’s discovery of special relativity came from 10 years of meditation on how to reconcile the relativity of motion with James Clerk Maxwell’s theory of electromagnetism, which describes the propagation of light."
Your problem is more than just Einstein, it is that you cannot come to terms with
Galilean relativity.
Objects, events, motion, acceleration are
objectively relative to the frame of observation in the real world. This is true regardless of the mathematical formulations that physicists (or you) concoct.