Well, I'm certainly no expert on QM, but my understanding of the state of the field is that Einstein's reservations have yet to be effectively addressed.
This thread is not about quantum mechanics, so I will keep my rebuttal brief: As an example - Einstein came up with several things he felt would be absurd results of quantum mechanics - quantum entanglement being a major one - that experiment has shown to actually happen.
And there are, in fact, a number of quite competent physicists who take them seriously and have worked out interpretations of QM which, like Superdeterminism, both satisfy Einstein's objections AND are consistent with all experimental evidence.
That, of course, is not sufficient. To prove correctness, a competing theory must also make testable predictions other theories do not. However, superdeterminisim 1) so far is only represented by what we'd call "toy models", that don't handle meaningful calculations, 2) violates falsifiability, and so cannot actually be tested. In essence, superdeterminism isn't science.
Also 3) It would mean there's no such thing as free will. This is not a technical problem, but it is philosophically troubling.