Do people say of fathers ''Oh poor you! you are not a monster, you must have depression adjusting to the new baby
On the whole, they don't.
It is of course possible that the OP is, as a PP mentioned in a different context, "not Mum material". However, given the way she is describing the situation, and given the age of the child (still a baby), I think it would be wise for her to explore all the possible options and reasons for feeling like this, rather than just deciding at this point that she isn't "Mum material" (whatever that might be). If, having explored everything, nothing changes, then she should know that leaving her husband and child is an option. Years down the line, though, she might want to be certain that she gave everything a fair shot - otherwise she might always wonder.
OP, I found it very difficult to bond with my first child (again, hellish birth, severe physical damage caused to me, breastfeeding went wrong, etc, etc, etc). When he was born, I just thought: thank God it's out. I just didn't feel it. I didn't tell anyone because I thought I'd be judged. I started to feel it much more once he 'went interactive'. He is now 19 and is the absolute best company (and has been for a very long time). He was a lovely younger teenager whom I enjoyed spending time with. I have a bond with him that I've only ever had with my own mum.
I bonded instantly with my second child, and doted on her right from the start. However (and I'm ashamed to be even writing this now), I feel detached from her now that she's a teenager. She was the sweetest, funniest, sunniest baby and toddler and little girl, but every minute now feels like wading through a swamp. It is problem after problem (school, friendships, appearance, social media - you name it, it's a problem), when I just want a quiet life and to be left alone. I do all the right things and say all the right things (though she thinks they're all the wrong things), but I just don't feel anything at the moment. It may partly to do with lockdown, which has been horrendous for me - but my overwhelming feeling is that I can't wait for her to leave home.
I feel like slapping myself for writing that
. But I suppose I'm trying to say that maternal feelings aren't as clear cut as they're made out to be, and they can ebb and flow, and are often dependent on things that are not even directly to do with our children. I don't know if that makes any sense.