I just recently started lifting the past month. Put together a small home gym I'm pretty happy with so far consisting of only a couple barbells, a squat rack, bench, and plates. There's not a lot of fancy programs I can do with this equipment but whatever. I've been doing Starting Strength, but some days I just don't have the strength of the previous workout so I feel like I'm regressing or not progressing at all.
I'm 6'0" about 207lbs. My lifts are Bench 335, Deadlift 525, Squat 425, OHP 205, and I don't know how to power clean very well and since I workout by myself in my garage, I've pretty much abandoned it so I don't hurt myself. I get plenty of rest and food, sometimes more. I drink about a gallon of milk a day, eat a tub of cottage cheese a day, and have a couple huge meals consisting mainly of meat. I've worked in hard labor jobs my whole life so I feel like recovery is adequate.
Why am I on some days able to hits at the sets and reps of a weight on some days and not on other days? I can post form videos if maybe that is the issue.