In fairness, the cited article does describe a well-documented
instance where Einstein's fundamentally disagreed with some of the
principles of the then new science of QM. An irony is, his
explanation of the photoelectric effect helped to establish QM. It
was at the Fifth Solvay Conference in 1927 where Einstein is said to
have quipped "God doesn't play dice", and Bohr is said to have
retorted, "Don't tell God what He can do."
And in fact, GR and QM have fundamental incompatibilities, ex. GR
predicts singularities and infinities, while QM prohibits them. My
understanding is GR and QM describe different parts of the
metaphorical elephant called our universe.
You're entitled to your own opinions.
You're not entitled to your own facts.