That was my biggest criticism. Maybe I could have suspended my disbelief back when I was single, but now I'm thinking "my wife would be holding an intervention for me after the first day, if not sooner".
I essance, it is kind of bizarre and more felt as breaking of the third wall, a wink to the reader, but it is not something that I can't understand. Many man going through stuff like that alone, when asked if everything is fine, for sure they will tell 'its fine' and than decide to kill themselves.
It's possible that his spouse didn't even notice that he was slowly losing it. It's possible that his spouse _doesn't even know_ that he gets punched in the stomach for work.