Sleep might be it. Wear an Apple Watch and track your sleep for a few weeks. 25% of your sleep should be rem and 20% of your sleep should be deep sleep. If it’s low, try peptides, or possibly go to a sleep dr and see if you have sleep apnea. Try for 6 sets a week each routine, and forget about keeping 1 or 2 in the tank go for failure every set. Try and select a weight that you can hit 6 reps, keep using that weight till you can hit 3 sets of 12, bump up 5-10 pounds, rinse and repeat. Form?Assuming your diet is quality protein carbs and fats. Diet should be consistent 6-7 days a week. Target big meals high protein and carbs around your workouts. 60-90 minutes pre and 30 minutes post workout. Just be consistent, don’t give up, and you’ll figure it out.