It shouldn't be this hard to only have a couple beers and be done.
I think all of us who finally quit drinking probably went through this phase of trying to "learn" to drink in moderation. I tried every alcoholic's trick in the book. Change drinks, change where I drank, keep track with matchstick-counting (LOLOLOL) - yeah, that was ridiculous. Not buying it for the house. Not drinking during the week. Having one or two then quitting.
It doesn't work.
Good luck with that.
It is a whole lot easier to just stop completely than suffer the repeated failures of the moderation experiment. It will never work. It's addiction.