I suppose I am becoming irascible (you think?) … it comes with age I suppose. I agree with Dee, but would maybe state your case in a more “cantankerous” way: Your therapist is not getting the hairs!
Of all the methods, the blend especially is the “big bang,” and certainly should have cleaned you up in a short time (within 9 - 10 months at the maximum). Common understanding is that the blend is great for big hairs and not the best for the tiny “fuzz” … and, that’s a correct evaluation. (I don’t do blend on the fine, nearly vellus hairs either.)
I just finished up “Katrina” who had a much more-than-average bikini area (total time was a gigantic 21.5 hours … she tops the record. Then again, it was for “everything.”) I also did her complete eyebrows (yuck, ha ha ha), that had been tortured and tweezed for decades. What a MESS! Total time was about 4 hours — duration <9 months.
I did a fast computation on your case: if you went in every two weeks for 15 minutes (over 2 years), your total treatment time would have been 7.8 hours. Not especially unreasonable. Still, that seems like a lot of treatments (26).
Count up your actual time in hours. That will give me something to really “go by.”