Do you understand that you never had control over his retirement plans and date? You write as if you gave him permission about when he was allowed to retire. Maybe it is your wording, but that seems rather strange and very boundaryless on his part and controlling on your part. He wanted to retire; we ALL eventually want to retire. That isn't about not caring about clients; that's just normal adult planning, but you write about it as if it is unusual or wrong for him to have those kinds of plans. I wonder if part of his decision not to see clients one-on-one anymore is that he is transitioning into retirement and direct client contact works counter to that transition for both him and any clients he would be working with.