He's done some horrendous things in the past under the influence which I'm not even going to mention as I'm ashamed I stayed with him.
You have been in survivor mode - lurching, firefighting, from one incident or crisis to the next. To survive mentally you have had to erase or minimise things that have happened.
But it’s all there.
I would recommend journaling to keep you in track at this important time (this thread could serve as part of it).
I would start with a chronological list of all of the drunk related incidents over your relationship, what you did, how you felt.
This will show you the totality of what you have endured and what you are wrestling with. It will allow you to see the patterns, repeated, cyclical nature of the impact and the decline in your MH and family life as his problem gets worse and his denial increases. This is where YOU need to drop the rope - detach, detach, detach - because all of the engaging with him is sparking your rage because you are dealing with a liar.
You don’t need to engage with rage with him - it is FUTILE - he is draining your FINITE energy. Don’t let him take any more. Don’t give him anymore. SWITCH it to power you through constructive actions and seeking support.
Actions, actions, actions.
As PP have said tell everyone you are getting divorced - this pops his deluded gaslighting bubble into reality. You have no concern of his opinion or that of his friends. You have made a decision for you and your children. The train has left the station.
Refer to your list when you wobble and find some affirmations that remind you that you are now doing the very best thing for all of you.
Decide that you have been round this loop - which is a descending spiral of despair too many times and you are now stepping off.
It doesn’t have to be dramatic and chaotic - just nudge along with actions each and everyday.
Get family and friends involved - tell them you need help - that he needs to removed from the house because he is a risk to you all. If they don’t want to help - get an occupation order.
You are brave and courageous. You are giving your children the greatest gift of a calm and peaceful home with a relaxed attuned Mum that will ensure their emotional stability throughout life.