It's not a criticism of her, but that's grim.
I cannot even begin to imagine what it must be like to walk into a room, or in this case the garage, to find someone hanging by their neck dead! Killing yourself like that is such a cruel thing to do because someone has to find you like that! I can completely accept what his widow is saying there, he is at peace but, she has that gruesome and lasting image in her mind that will stay with her until the day she dies of her husband hanging.... there is no way that you could ever erase such a memory!
Some suicides, or self-harm acts, just happen where the primitive part of the brain takes over your rational brain and then the next thing you know (or don't know), it happens - without you being able to make sense of it or control it.