The words “Einstein was wrong” should always be used with extreme caution imo. Wasn’t the point of the EPR thought experiment to show that either quantum theory was incomplete, or it implied a fundamental reality which was non-local? Almost a century later, and sixty years after John Bell, weren’t they right on both counts?
I want to expand on this a bit because it is often misunderstood. Einstein disliked the probabilistic aspects of QM for philosophical reasons. The EPR thought experiment was proposed as an example where QM gave results that Einstein thought would not be possible in the real world (spooky action at a distance). Because QM predicted those results, Einstein thought it was incomplete.
Later, Bell showed that a local deterministic theory could not make the same predictions that QM does and so there is a clear experimental method for determining if QM is wrong. Bell's inequalities universally hold in local deterministic theories, but fail in QM.
Later, an actual experiment was done by Aspect that showed that Bell's inequalities are violated in the real world. Furthermore, they are violated in exactly the way that QM predicted they would be.
Remember that Einstein thought that the QM predictions were wrong. he thought that the simple fact that QM made such predictions showed it could not describe the real world. Instead, the Aspect experiment showed that QM *does* agree with the real world. That implies that the real world is non-deterministic or non-local or both.
QM is local and non-deterministic. It is inherently probabilistic in its predictions. In contrast, Bohmian mechanics is non-local and deterministic. Einstein would not have liked Bohmian mechanics either. That said, Bohmian mechanics does not extend well to relativistic situations, especially those involving anti-matter. QM, on the other hand, deals with these things quite well (in the form of QFTs).
At this point QM has been extensively tested in a huge variety of different situations. And in every case, its predictions have been validated, even when those predictions were incredibly counter-intuitive (EPR is only the first of many--quantum erasers are another fun case).
So, Einstein had an intuition that QM would be replaced because of the predictions it made in the thought experiment. When the actual experiment was done, QM was vindicated and Einstein was shown to be wrong.