Later in life Einstein admitted that he believed in a universal, but not personal, God.
But he never once mentioned a god in any of his theories, nor did he ever base his theories on a god. You are wrong, just admit it.
Yes he does. He said that QM Theory is bunk and his GR/SR Theories are correct because "God does not play dice with the universe".
That's all he had to say on the subject of QM.
That's why he went to the Solvay conferences, which were largely to discuss quantum mechanics, and talked many atimes with Neils Bohr, trying to come up with models of quantum mechanics which were self-contradictory? Or why he wrote the EPR paper trying to show that quantum mechanics must abandon either locality or reality, two things which most scientists of the time took for granted, but later locality did end up being abandoned? Also, special relativity was made compatible with quantum mechanics as early as 1929 using quantum field theory.
Also, you completely misunderstand that quote. Einstein was a pantheist. By universal god he means that god itself is the Universe and the Laws of Nature. A personal god is by nature one that can have an effect on a person's life in a meaningful way. He was not even a deist (which many Founding Fathers were, by the way). People quote-mining Einstein gets quite frustrating. Tell any serious biographer who has studied Einstein your thoughts on that quote and they well tell you to gtfo. Maybe you should even read a biography of his. I recommend Walter Isaacson's - it's a very good read.