What is best for you at that time? Everyone's then I will do this... is very different.
Is the drinking unacceptable to you? Who is the A in your life?
For me, the daily drinking and behaviors that followed were too much.
I told my exabf I couldn't live with the daily drinking and specific behaviors, lack of other behaviors. He replied he wasn't going to stop drinking. So once I had enough, my boundary was to leave. His actions progressed, so mine did, too and we sold the house and ended things.