I have not struggled with the same reasons you are with Al-Anon, but at times I have struggled. For me admitting that I was struggling was a big step. I had never admitted I struggled with something that provided a structure or a framework before. Talking about it in Al-Anon and with my counselor helped. I have had to hold on very tight for a little bit right now of "Take what you like and leave the rest."
I am in agreement that there are other options (many of which I have used). Here is one of them.