Why is my dad treating me badly?

My dad is like Hitler 2. He never gives me freedom. He always tries finding fault with me, and even if I dont do anything wrong, he keeps insulting and starts scolding and gets the stick to hit me. I have a younger brother and he gets the most importance, and I have no part in the family. even if my dad, mom and bro talk to each other, and if I join them, my dad gets irritated and starts his bad works on me. I am treated like a stray dog.
Any help ??

That sounds like he's abusing you. If this gets worse, you might have to contact some authority.