Yeah, my DH can't handle doing a chore and managing the kids either. After a short while he's always super flustered and needs a break. I'm like, uhmm, I do this all day, do you want me to be all pissy at the end of every day? He'll say something like, but I'm not used to it! Yeah, like that makes it easier. It's why most men aren't suited to be sahp. They have a hard time doing 2 things at once and getting it all right..
It's almost worse, though, when the opposite happens. My dh seems to have little to no trouble cooking dinner while watching both kids and every time he runs errands with them, everything goes smoothly. I swear they are just plain different around him and he thinks that it's not a big deal and doesn't get why I complain. The reality is that he's novel to them and they're novel to him and so things are just generally easier. But when it's mom day in and day out the behavior deteriorates and then things are not so easy. Not to mention that doing something with the kids for an hour or two is NOT the same as spending the entire day, every day taking care of their needs. But every time we have this conversation it devolves quickly b/c he thinks, by default, I'm saying his job is easy. Frankly, it's not about ease, it's about the stress level, patience, and self sacrifice that is involved with being a SAHM. His job is not easy- not anyone could do it, but he is intellectually stimulated by it and gets to regularly complete tasks that he enjoys.