You might not like the evidence, but there is some
Primate ERV chart Source
There are thousands of primate ERVs. Every one of them follows the same rules for which species it is found in.
"Proof" like the proof of Pythagoras' Theorem? NO.
"Proof" beyond a reasonable doubt? People have been sentenced to death, rightfully, on much less evidence.
That is not evidence, it is totally subjective opinon based on extrapolation from conjecture.