@Exutant
Perhaps the type of woman who won't (cant?) separate will also cope less than perfectly after a failed marriage and still not live up to their children's expectations?
You have no idea how strong you are right now and how much you are currently carrying living with this dysfunctional, degrading and exhausting situation. You are just using your strength for the wrong person in the misguided notion that this is best for your DCs.
Moving on from this will release your strength and energy from propping up this facade and free you to give your DCs and yourself an emotionally healthy, robust and calm childhood which will set them up for life.
I don’t think that you can wrap your head around that vision right now - but please look at emotionally supporting yourself separately from this relationship. Even if you just emotionally detach in your head. Drop the rope. Take a breath, get support and it time the path will be clear.
Many of us have walked this path.
Emotional freedom is glorious. The money and lifestyle is not worth it - although you will be fine - you will have enough money - and then in time an abundance of positive energy.
Honestly it’s wonderful on the other side.
No woman ever regrets leaving a financially controlling, emotionally negligent, problem drinker.
Having a calm and peaceful home life with kindness and respect is worth so much more than £££££