RANT anyone having difficulty with their partners?

So my sweet babe is exactly 6 weeks old today. Generally I'm enjoying every seconds... Except when my husband gets home. I get resentful because he goes about his nightly routine as if we never had a child! He won't independently help with the baby, but will pitch in when I ask. He hasn't changed a diaper in weeks and never done a night wake up call. He wants me to exercise and lose the baby weight, and can't understand why I'm to exhausted to do it. And on almost a nightly basis he tells me that he doesn't see the return on. Investment of having a baby. I just am so pissed and upset right now.... Rant over....