Step parents?

i hate both my steps! my step mom is a mega *****, she drives me insane. she thinks that she can just bark orders at me, when ever i try to say anything and is she doesnt like it she just tells me that its her house and storms away. we get in fights a lot then my dad gets home from work and she starts crying, she is a witch on a broom stick when it is just me and her and then she acts all innocent when my dad gets home. she tells him she just wants to be my friend but i know that isnt true cuz he kids get better treatment then me my brother and sister. how do i make my dad see the truly insane ***** that she really is?? how do i deal with he insanity???