Hi Dcs, thanks for posting your comment.
I'm very sorry to hear that your husband has had to have brain surgery but pleased he is consulting a therapist, as I've also had a brain injury and depression plus anxiety became an added demon to the list of traumas.
A traumatic brain injury interferes with the way the brain normally works, nerve cells in the brain are damaged and will cause changes in his behaviour and abilities to achieve what he once was able to do.
I agree with Croix to seek help from your doctor and I know that your husband doesn't want to be answering questions, and I say this, because, an enormous change is something he has to try and understand the reason why it has had to happen.
He won't be able to do what he was able to do before this happened, and there will be times when he may get cross with himself.
I can give you a couple of sites about brain injury if you want, the reason I'm not posting them now is that my comment will be held back for moderators to check, but please let me know.