Give him some grace. He's allowed to be frustrated on the path to figuring things out. He's spent less time taking care of the baby, so he's not as far along as you are with trying things and seeing what works. Don't stand over him and henpeck, or he will never find his own style. Give them some time alone to bond. Certainly you could use a shower, a trip to the store, or some time to just lay down. Tell him he's doing a good job even if it's not as good as you would do. 😉 As long as he keeps trying, he'll improve.
I feel like it’s an excuse to push everything on you because he doesn’t know. So why not take the initiative to learn the routine, to know what to do.