Your DD needs at least one functioning attuned emotionally healthy parent in her life for her to have half a chance in life.
Currently she doesn’t have one because her DF is an emotionally absent, neglectful and abusive alcoholic (even in the hours he is not actually drunk - he is morose, angry, hungover, obsessing) and you are being abused and hyper alert to cover up for your DH. So you are exhausted, depressed, anxious, preoccupied with his antics and feeling trapped, bullied, threatened and subjugated - because you are.
When you are in this mental emotional state - you are not present or emotionally available for your DD.
She sees, hears, senses, absorbs and internalised the emotional environment of a preoccupied, sad, anxious Mum.
This will make her feel v sad, confused and insecure. Seems like this has already developed into anxious behaviours for her already - these then develop into significant, chronic and debilitating MH problems in teens and into adulthood. Ask any parent on here who has brought up children with an alcoholic - or any poster who was the child in an alcoholic household.
Your DD has one way out, one chance to recover the damage and to get her emotional development back on track to happy, healthy, confident, secure and resilient. And that involves you removing her from this toxic environment so that you can heal and be the best mother you can be for her.
We all only have finite headspace, time and emotional energy - choose to conserve and focus yours solely on your DD. Do not let it be drained / hijacked any further by this man - she needs it not him.
You need to leave.
He will punish you and play a nasty game. But he is not above the law - KNOW that - they have seen his type time and time again - deluded, arrogant, entitled bullies.
Seek legal advice quietly - play a calm game of stealth. The law is on your side. You can get supervised access due to his addiction. You are entitled to at least half of family assets. He can’t hide anything - it’s all online - it’s illegal. Some solicitors will run an account so that you pay your fee at the end once family assets are divided. Invest wisely here is a top lawyer - it will save you time and money in the long run.
You need emotional support for you to hold you through this. You are being emotionally and financially abused. His coercive control is also illegal.
Keep posting your whilst you come to terms with all of this.