New mom dealing with narcissist in-laws?

I’m with my partner 10 years I have never had a great relationship with his parents or brother, they are narcissist. Since the arrival of the new baby our relationship has become worse because I just won’t step aside. I am constantly arguing with my partner because I am standing my ground and won’t let his parents take over. He turns a blind eye to the behaviour trying to exclude me and just treat me as if I don’t matter. His mom done up a nursery for herself I really think she thought I’d carry my baby and she would just take over from there.
when I called to tell them that I just had gave birth they asked could my partner and the baby leave the hospital. no love or support all they where concerned about was when was he coming to their house.
When we did get home 3 days from hospital my brother in law told us they are expecting now and his partner was 4 weeks pregnant. Everything is competition. When I drop my baby over once a week to see the grandparents they don’t like giving my baby back when I take him into my arms they won’t hand him over , I’ve also had concerns about dogs around my baby and it fall on deaf ears. I’m setting boundaries and trying my best to stand my ground so these people don’t take over. When I try to address the elephant in the room they act as if I’ve the one with the problem. I’m new mom and won’t allow over night stays with grandparents and I’m labelled as controlling. They are over stepping the mark too much. They play my partner and act like they are so great when I’m dropping the baby off once a week I just have birth and had stitches and they asked me to take the pram in I lifted the pram myself ans they took the baby and closed over the door Please help

New mom dealing with narcissist in-laws?
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