Can it be told how I'm thinking of putting my newborn in the backyard for the night?
Why would you leave them out in the cold? I just think you are being overly dramatic and I can't believe you actually want to do this.
I don't want to be bothered by the brat all the time, will it grow up without my help? Will it thrive? Can I test if it can survive by putting it outside now?
I think that you should let the other parent take over for a while. It is never okay to let a baby lay out in the cold all night. They have no way of keeping themselves warm or protecting themselves.
I came here to vent, get off my back.
Leaving the child in the cold could kill it. Then you will be jailed for neglect. You had the baby so you are responsible for taking care of it no matter what.