There have been rumors of his cheating and philandering for years, he himself referred to his wife publicly as a
"saint"while there have been NO rumors of her being the wrong-doer. So, it is counter-intuitive for you to be hypothesizing that SHE was the catalyst for this divorce. No, he is the hypocrite.
You don’t know what alienated him from his wife. Neither do I.
Why is it so difficult to believe that he could have rightfully grown alienated from a dreadful spouse?