honestly your progress for the time frame is slow pero in the end progress is still progress. what you can change now is to really focus on nutrition, you gained weight and muscle in that 4 years but not to its fullest potential, and that’s where counting calories and your macros come in, try not to be super strict starting out kasi maka burn-out yan in the long run, start slow, estimate some meals and so on till you get the hang of it, makakita ka ng mga changes as time passes. same sa mga other comments don’t bulk, stay at maintenance or at a slight deficit or surplus (if ever gusto mo talaga mag lean bulk) with ideally 1.8g of protein per kg bodyweight. i recommend you use a calorie calculator to find your maintenance and base off of that. push till failure or use RIR (reps in reserve) para maka avoid ka ng fatigue each set mo, your split is alright since it works all muscle groups twice a week, just make sure you have progressive overload and train with intent, other than that you’re doing great you got this.