Good luck at IC! Hope you get a good one. I"ll be curious to hear what IC has to say.
From the texts, sounds like H is feeling ineffectual. Whether he felt that way in the past or whether it's since the separation, not sure. He sounds like he feels judged about his manhood and effectiveness by you and your dad. This may have been a problem he had in your M that he secretly kept to himself and now with the distance you are seeing his comments more clearly. Or they're new and came with the depression. Still what people obsess about when depressed does provide clues, right?