Well done you. You're doing great!
Oh my god, AH's parents are being d-bags, aren't they. "Talk constructively"?! Maybe AH's dad would like to come over and "make some progress" on changing a freakin' diaper.
Seriously, just block their texts. You don't need that.
The good news is you've got an awesome healthy little baby. And the baby has a great mom.
AH has totally chosen alcohol over family. What a sad, terrible thing. But it's his loss, in the end. You're too busy being awesome, I can tell you're going to come out of this just fine!