Sure you want to stay with this thing? (won't write DH, or even H - it doesn't seem to be fully human)
Bloody hell, he's horrible.
But here are a few suggestions for dealing with Mr Critical:
next time he's bored with baby after two minutes of holding her:
'Why are you so easily bored and unable to bond with your child? You're crap. I'm so much better at relating to her. You can't even do it for a minute and even then your attention is wandering. You are so bad at this...' etc.
next time he complains about not being single childless and 22:
'Why are you so immature and crap at being your age? Do you have a two second memory, or are you just unable to appreciate all the things you've done so far in life? You sound so pathetic when you complain and whine about something you can't change. Just because YOU failed to make the most of your life when you were young doesn't mean you get to spoil everyone else's experience of being a family....' etc.
After a few days of that, ask him how it feels to be constantly criticised by someone claiming to have a better understanding of how it feels to be you than you yourself. Irritating, eh.
Then pack and leave!