Not saying that all happy co-parenting relationship aren't beneficial for everyone but often when a new partner comes in and is seen to want to make changes to the "happy" co-parenting relationship, it's because it wasn't actually working for both parents and often the dad was just tolerating things for an easy life.
Nah..it's the new partner who doesn't like it.
I believe that if you enter a relationship and don't like what your see, in terms of the coparent relationship, then just leave.
Instead... the amount of times that I see things like... his boundaries with his ex are terrible
What that means, is the new partner doesn't like it. Instead she wants to dictate rules for his he should communicate. It would make more sense, to move on.
I don't know if it's a case of thinking they can't find anyone else that keeps them there.
All too often, the problems you see in the first few months don't change for the better..yet time and time again, women choose to stay in these relationships..and all of a sudden, their pregnant...despite all the complaining about the ex and the stepchildren.
It's tiresome to have to manage all these feelings, when your just trying to be a good dad.