Looking through your training log, you have no set arm workout or method of progression whatsoever - it’s just different exercises for different reps, sometimes 1x26 and sometimes 3x14.
Here’s an old thread where CT outlined an arm specialization workout:
Follow the program to a T, give it a go for 4 weeks, and take before and after measurements. Tracked progression, whether percentage-based or not, is the unifying factor amongst effective programs. Gonna be impossible to track progression with what you’re doing now.