This sounds like a maturity thing, on both parts. He doesn't sound experienced enough in the professional world to know how to draw boundaries and clock out, without feeling insecure that his job might be jeopordized by not putting in a ton of overtime (also, where is he going for 3 hours before his shift every day?) But it's also unreasonable to try and manage someone else's time based on your schedule and be mad he didn't read an article within 3 days.

His comment about him not having all day to sit around on the computer leads me to believe you have a much less stressful job, so at the end of the day, he doesn't want to come home from putting in 5-6 hours of overtime and have a list of things you've prioritized as important dumped on him, and it leading to an argument if he doesn't get around to it for a few days. Honestly, 3 days sounds like nothing for how much he is working. He doesn't have time to do more than what you are expressly asking (putting up the bassinet) because his brain is probably fried at the end of the day

It sounds like you guys aren't communicating well, at all, which you already know.

How old are both of you?