I too feel your pain. Even as a person growing figs for less than a year. I have tried a number of methods, as I am sure most people do. What I learned, for me, is that a lot has to do with the cuttings you start with. A method that worked well on one set of cuttings failed on others, and I take very careful notes to duplicate the method.
On some cuttings I had 100% success rate. On others I failed completely. Example of my failures would be Smith, where the cuttings were old (I knew this going in). Battaglia Green and CdD Gris were also 100% failures (these were green cuttings, and I have had issues getting green cuttings to root). Most attempts were somewhere between these two extremes.
I have picked several small trees of special varieties, to be sure of success. All from members or reputable nurseries.
Keep practicing with the cuttings is all we can do. I have practiced on many that were easy, and free, to obtain locally.
Cliff H.