I so hear you on this. Alcohol as proven to be the biggest challenge I have faced my entire life. I kept getting on that sobriety horse and falling right off. It's hard. The most important thing is that I kept getting back on and this time I am hoping it will stick.
One thing I have done is explore lots of different options for quitting. If one didn't really work I tried something else. Meetings, therapy, groups, message boards or even a prescription for Antabuse. I just kept looking instead of doing the same path over and over and getting frustrated. For me, I had to find the right combo that worked and I finally found one. We are all different and you will find your path to sobriety.