There is no real accurate way to formulate what the price/cost of ‘raising a child’ is. The state has to come up with some across the board formulation that works for everyone. You said you got a deviation of 200 over the State suggestion and you get alimony.
It is unreasonable to think that you will absolutely maintain your standard of living after a divorce. There has to be some modifications. I understand that he makes 3x your income. His new life will always be more extravagant than yours unless you can match his salary. That is just the way it is. It works the other way too-the wife can make more money.
In reading your posts, I am trying hard to see why a judge would mandate things you say he’s mandating unless it is in some agreement you signed (like the 50/50 split expenses). He would only be enforcing the papers. I don’t know if there is a way to try for a modification of papers with your ‘change of circumstance’ being the past months of 50/50 splitting that has run you into financial trouble.
For him to purposely do this is really mean, in my opinion. If he knows your salary and he’s over-extending your ability to pay, then it’s really not a nice thing for him to do.