in my opinion, there is a good chance he is gaslighting... she is not perfect, of course--but neither is he... but the failure of the marriage seems to rest solely on her... something is amiss here... and because he had PAs and EAs in his first marriage, i do not count it out that he just wants out of this marriage just because, like JujuB said, "he is not a committed person... he is looking for excuses."
i would like to know more about how he was toward her in the marriage... how much interest did he show in her and her passions? it's obvious he is not an adequate communicator... he didn't share his pain until he was ready to walk... i think, all-in-all, his needs are greater than her needs...