Need help

My oldest boy just turned 14 and I need help with him. He has always been a hard child to parent. Recently he has started lying and acting out. His school grades are going down despite that we are paying for tutoring. He hates his father (and his father said to me he doesn’t like him either) Im stuck between the two of them. I want to support my child but also discipline him. My husband sad to me lastnight that he can’t handle it anymore and is thinking about leaving us (me and our two boys) I don’t know what to do? 😢