Honestly, like someone said, stand your ground! Tell her straight up it’s one hand wash another. I’ve had the same issue with my GF, but I didn’t do everything you’re doing. I’m the sole breadwinner and the guy who fixes anything that goes wrong.
In the end, if she can’t meet you halfway then leave. If she’s not willing to try, it’ll always be a 99‑1 and you’re losing.
But at the same time, if you do leave, find someone who’s down for you and yours. Remember, these kids are watching what we do and think that’s how they should act when they grow up. So in the end, be the man your daughter wants to be with when she’s grown. Or be the man your son wants to look up to give him a role model no one else can match. It’s up to us to teach them what a man is. And never forget little eyes are always watching, and little ears are always listening.