Sometimes I wonder if I'm doing something wrong. 18 months in to GB and I'm largely still on only PE1 and PE2 aside from SLS. Thinking I might double down on exercises which I've already mastered (FL/PE1, RC/PE1, sPL/PE1, MN/PE1, HS/PE1, and pHS/PE1), but whose later elements have long been elusive. Maybe starting over on RC, MN, FL, HS, pHS, and sPL, is what I need and is what's been holding me back.
Edit: what would be the best course of action? I already have every course for which I'm applicable, so everything shy of Rings. But the lack of progress is frustrating to say the least. Not sure what more to do/to do differently without either breaking the bank or starting back at zero with GB or a different program altogether. I currently perform Foundations on a 3-day split with HS on Tuesday/Thursday, and Movement on Saturday. I don't feel neurologically fatigued, per se, so I know I'm not overtraining. Yet, at the same time I'm putting in the effort and going hard on each set with effort and form, yet I'm still not making gains on the elements I've mentioned.