You are right. I never trust anyone including my parents since when I am little. Parents are just selfish while they were trying to sort out their own problem and not realising, we are suffering. Sometime felt like it is meaningless and hopless. felt disgusted at times. But you know what. When my family members accepted Jesus, love enters into our lives. My mum no longer nag and becoming so loving and now she is my best friend. My sister do not throw her anger and create trouble every day...now she is calm and adorable.
I have no idea why your dad cares so much for ppl when he can not even deal with his own family. He had failed not only you, your family but most of all, God. Whether you believe or not, God is not at all happy with Him. I believe God has a way in dealing with your dad. How it turns out, it will be amazingly miracle just like my family. I hope you get your comfort and hope in God...how? if you really have the desire to seek God, He will come to you. "If anyone come to me, I will give him rest" that is the promise from God. Seek Him, and I promise you that you will not turn back. Attend a cell group and get to know ppl. Why? as they will be there to give you comfort and strength when your family can not do this at the moment (until God works in them). God bless and remember that God loves you and He did sent ppl to you....but you have rejected help.