Texas State Court

Texas state court
What are some of the ways to prove a mother unfit in the state of Texas?

I just need to know if my ex has any grounds to stand on in court because he is threating to declare me unfit in court and take my son away from me. This man is really good at mindgames and mental abuse, he also has a way with getting people to believe anything he says.. I just need to know what does the courts in texas look at to prove a mother unfit.

I would examine what kind of case he has with an attorney’s help.
Sue him in civil course if you have a case against him.