@Kit0069 You have done absolutely the right thing at every stage. She could have killed someone, imagine if that someone had been a child. It would have been her responsibility solely - she's the one who is choosing to drink & drive - but imagine how you would have felt if you hadn't done everything in your power to prevent it. My cousin was paralysed from the neck down as a teenager by a drink driver. She's in her fifties now, her life has never recovered.
You being unhappy with her drinking is not an excuse for her to simply drink elsewhere, putting others at risk in the prices. None of this is on you. It's on her.
Please don't beat yourself up about this. I know something of how you are feeling - my ex was an alcoholic & was banned after a drink driving accident. This was before I met her, I had no idea. She drank herself to death at 51. That wasn't my fault, it was hers. This isn't your fault, it's your wife's.
You've acted like a decent & responsible adult. I applaud you. Please take time for you, think not only about what you want for your future, but about what is possible. I used to want a future with my ex, but in that imagined future she was dry. The truth is that future was never going to happen. Eventually I faced up to that, & I had to think of another future, in which I was still ok & not living with the consequences of her actions. I got out of the relationship & for what it's worth am now happy in a new relationship.
I'm grateful to people like you who do the right thing even when it feels like the worst thing. I wish you all the very best.