When are you going to see she is manipulating you and using you for the money bags you have?
She isn't going to 'snap' out of it. She doesn't 'love' you. She sure as hell doesn't 'care' for you. Or Im missing something somewhere?
Honestly I don't think that brick wall you're butting your head against is going to go away anytime soon. Best you wake up and smell the roses because she's laughing at you and having a right ole' time at your expense.
You've been given solid advice from Homegirl & Answerme with getting it legalised. And the justice system in CA is as fair as any other I know of. I lived there for a while and knew of two families going through similar to what you are and one of the father's won.
So I guess it really does come down to you and what you take to the table and how badly you want full custody. So far I'd guess30/70 her favour. You've no fire in your belly to win it. You want to pacify her and try and save her the problems of being able to tough it out financially.
Who the hell cares? Hes your son. Fight for him. If it was me.. I wouldn't give a flying donkey's what my ex had to do to survive or try to defend.. I would fight and give the shirt off my back for my child. Damn anyone who'd want to use her against me. Family, friends or foes.