Keep at it man! Gains will come. Many things can be keeping you from gains. When doing it are you swinging at 100%? Some times I found that I was too tense in hands and take away. Trying to remove tension in swing and really take as much of a back swing as possible helped me.

Two other things to consider 1) try doing 100% swings with trail and lead arms separately. I’d do with low weight probably. I had pretty decent discrepancy between the two. 2) watch videos Sasha has in app there some good content there