I know it's still frustrating to you, but he's had a lot of change in the last year. Retirement can be so hard on some people. There's a loss of power and control and having to depend on others instead of having others depend on you. It's hard for us, too. I remember realizing how much my father had aged when I wasn't looking when he hired someone to do a fairly simple plumbing repair - something he used to do for others. All of that can set off a negative reaction - almost a new toddlerhood. Maybe if you find ways to give him a sense of control over certain things (like giving toddlers defined choices) or asking for his opinion for work when you don't really need it (and may not follow it) it might have an impact on his attitude.