I feel you about sticking to the program and trusting the process and not program hopping but if Boris himself managed pig’s programming he’d take into account past training history e.g. coming from a background of high volume training. Coach Sheiko’s bestest program’s aren’t cookie cutter, written in stone or to be followed blindly even his personalized one on one stuff. It’s a fluid collaboration between athlete and coach.
The issue here is simple: not in how Sheiko has periodized, selected exercises and other defining traits of Sheiko programs but in the relative intensities and volumes prescribed that a very basic principle of strength training is being violated. Overload.
Doing less overall work/tonnage than before and expecting to get stronger is a big f u to the principle of overload.