<human>: Provide a brief overview of the text.

Background: I am the middle of three siblings in my family. Since I was younger I watched my older sister receive extremely unjust punishments from my mom, as much as I tried to learn how not follow in her footsteps I had no choice. There are an uncountable number of instances where she acts irrationally and child-like. I can see this is slowly tearing my family apart; my entire extended family knows how she is and will not stand up to her. Now that I am older I see the same thing happening to my little sister and it sickens me. Regardless of the situations she yells, threatens financially (I am in college now) and if I try to have an 'adult conversation' with her and the conversation is not going her way she will drop the conversation/leave the room/hang up the phone; it is obviously very frustrating. 

If it were just that I could live with cutting her out of my life and my sisters, although for obvious reasons her financial support is greatly appreciated. The kicker is that my dad is extremely unhappy and it kills me to see him so docile and tame. My dad is my hero, he has accomplished so much and I can never look negatively at him in any light. When the fights/punishments first started he would evaluate the situation and help everyone to see the rights and wrongs and 'side' with the one in the right. As the years passed he would get in trouble for not immediately taking her side and so now he is on her side in force while he is merely a shadow of who I used to know. This has affected every aspect of his personality now. Reddit, I'm not sure if I'm right, wrong, or if there are other options I haven't explored but I would like hear your opinions and advice on how to help my dad or get him away from my mother.

Note: There has never been any physical violence.
<bot>: Mom is crazy and tearing my family apart while making my committed dad unhappy. How do I help my dad? Talking to her does not work.