If the relationship is failing, both parties know it. As is said many times, the best defense is a good offense. He who files first, usually comes out on top. Never trust a lawyer, especially your own.
Having gone through the "Big D", I learned a lot on our judicial system. Thaank God my ex was as stupid as I thought she was.
1) she was too stupid to pay attention to how many guns I had.
2) She was too stupid to learn the gun safe combination.
3) she was too stupid to even consider I would file first.
4) she was so stupid she threatened me with a gun she borrowed from her boyfriend!
5) she was so stupid she misjudged our son (he chose to stay with me, so I got the house!)
6) she was so stupid she QUIT her very high paying chushy job, so she would not have to pay child support and pay me alimony payments!
I remained civil and calm through the whole thing and MADE my lawyer do what I WANTED, not what he wanted. Perseverance and logic won out.
The fatal mistake most people make in a divorce is that the lawyer will take care of things, lawyers are like water crossing a field, they take the path of least resistance, not the best for you.
Sorry for the rant, but my ex said the same stupid excuse to me as a reason for wanting a divorce (before I found out she had a boyfriend) "I just want to find myself" to which I replied, "If you don't know after 43 years, you ain't going to find out now!"