Hang in there breh. I still go through the exact same shyt sometimes.
I dont know if theres a right answer because even when the trust is earned and given, they may revert back to their bullshyt every now and then and then you have to use logic to remind them why trusting you is imperative. Its only so many times they can come crawling back to you on some "youre right" shyt before they realize they are better off just listening.
I just lead by example the best I can.
If I say I am going to do something I do it.
If I fukk up, I admit it and apologize.
Some of my deepest / darkest issues or secrets, I have told her throughout our friendship.
I make her feel heard when she expresses her own issues.
I dont act hypocritically
I break situations down logically (doesnt always work) and spell it out for her lol
Then In the moments where she's being combative i put my foot down and tell her to do what I said (after which she always comes back and says "you were right"). Sometimes I get frustrated to the point where I disrupt the trust though. It's tough man. Some of these women, especially black women are very fragile/difficult when it comes to this shyt. And the way I am, if a girl is spewing something that is false, idiotic, nonsensical, or passive aggressive it can cause me to be very snide/snippy. That's one thing i have had to get better at, is being more patient in the face of her bullshyt at times.