sadly, it's tougher for fathers to get custody, but luckily that's changing.
A lot of judges have this antiquated notion that a child is better off living with their mother. This isn't always the case.
You'll need to prove she's unfit, but more importantly, show that you are stable, have the income, etc. If you have other people who can act as character witnesses, that will help, especially if they are "professional" people.
As suggested, keep a detailed diary and lots of notes. It sounds like you've done a lot of that. Just remember going in, that the judge might already be one of those who feel the child is best served living with their mother, so be prepared already be at a disadvantage.
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