Agree with the timing, for me it was weeks 3-7 I really felt the strength kick in.....
However
Your running epi way low - 700 would be cautious. 300 is a bit pointless in my opinion.
1/4 is a touch low at 300 but shouldn’t be an issue.
You main problem is probably lack of food. You should be gaining (or at least maintaining weight) unless you are deliberately trying to cut. If your cutting (aside from the stack not being ideal) your unlikely to get much if any strength gains, but would shouldn’t lose anything either. A recomp or lean bulk is a better choice imo.
I ran that exact stack last year and put over 30lbs on squat and dead so it defo works....