AA methodology is problematic in several ways, but it has helped a lot of people.
I’d like to see a science-based approach be common, instead of people just getting told to go to a meeting. Just like with any other illness, medical treatment works best with outside therapy - break a leg, get it set, cast, and follow up with physiotherapy; depression, find a medication that helps and get therapy. Why is alcoholism (or more generally, addictions) specifically a pull yourself up by bootstraps problem? Naltrexone exists.
AA meetings vary widely based on type and location.
In my experience AA is well suited to helping sober alcoholics stay sober and relapsed alcoholics get back to sobriety.
What it's not good for is understanding alcoholism as a disease and understanding why an individual drinks to excess. For that you're better served by comprehensive treatment from medical professionals/counselors.
With absolutely no scientific evidence supporting their methodology. Just vibes based. Jesus had 13 apostles? That's a good number- let's make it 12 steps!
And still no evidence that AAA is any more effective than any other program or methodology.