Stick to 1 linear program ! Jumping from 1 program(doesnt matter which) to another way too early is hurting your lifts.
Ive also been doing SS for about a year and this video is 100% on point.
I could have progressed much quicker if I followed his basic advice.
My height is 183cm. I went from 165lbs>195lbs>180lbs(present)
Squat 3x5 265lbs
Bench 3x5 140
Deadlift 1x5 275
OHP 3x5 90
Rows 3x10 140
I had a bunch of random months off lifting due to injuries/work schedule/laziness.
Besides that the main reasons why I stalled/had to deload many times if because my diet has been inconsistent, I had many days where I ate under 100g of protein and many days of under 6hr sleep.
This year im going to keep a closer eye on my macros, sleep more, lift more.
Hope this helps.
Also lose the straps with such baby weights. Do double over hand until your grip fails then switch to overunder/hook grip.