I feel like a monster... Would I be this horrible if I did not have a hip so painful that it needs replacing...
Probably, I don't know you
Seriously. Books and info about dementia can are helpful for the carer to get ideas.
The trouble with books is that the person with dementia (just like books on babies) the person being cared for hasn't read the book, and is most definitely an individual and not a something that "one size fits all"
Sounds to me like you could do with some respite. Do have any breaks like day club for him or some one who comes in?
Chins up. xxxxx