agree with several others competitive tiredness work will eat away at your relationship, as has to work weekends as well it can be very difficult
try and see if you get lie in on sunday morning and he does on saturday
also if he comes home totally exhausted, let him take 30 mins to change collect thoughts but its reasonable for him to wash dishes after dinner then say if DC cries i'll see to him/her while you have nice soak in bath or whatever
the other thing i found helped was to try and do my housework etc, like running office its loads more efficient ok it goes wrong sometimes when baby is out of routine,
my baby was always quite happy playing with toes on mat in morning but not afternoon /evening so got on with some the more challenging stuff in mornings
lower standards do not wash everything that has been used just once, unless baby very sick 1 bib can last all day etc, very little needs ironing, move anything only once stright in laundry basket/ cupboard etc not in piles then sorted then more piles,
on the subject of posh lunches if you have them all the time its no fun sometimes I longed for a cheese sandwich and 30 minutes with newspaper rather than posh caesar salad and having to carry on smoozing without break. I remeber when was working even when single being too stressed and exhausted when got home to do anything other than switch microwave and TV on sometimes took 1-2 hours to feel myself again,
find the nearest mother and toddler group
dont resent your DH as he may be jealous of you spending all the time with baby, he may want to be with baby but is too tired and unfortunately babies ae not at their best between 6-8pm at night they are grumpy and overtired sometimes
my DD is 14 months old now the time you have when little is good, try and enjoy it ( incedently loads of men find small babies difficult my Dh is so much better with her now and much keener to look after her while I go out for evenings wthan when she was tiny, he was so unsure of what to do with her then
hang in there good luck and find some cheap treats for yourself as " payment " for a job well done
try thanking your Dh for something and a compliemt everyday and the habit will become contagious but oops that sounds way to much like self help book 