This is what your chest workout should look like now:
Flat bench DB press
5 sets - warmup, 6 reps, 6 reps, 6 reps, 12 reps
Decline barbell Bench
5 sets - warmup, 6 reps, 6 reps, 6 reps, 16 reps
Flat cable flyes
4 sets - 12, 12, 12, 12 (each set you should be fighting so hard for every rep past 8, have a spotter help you bang out what you can't, each set is slow and HUGE squeeze at the top, fill your muscles with blood)

After each set do some light stretching. After your workout lay down on a bench with 25lb dbs and let them pull your chest apart. It should be 1.5 minutes of pure pain. Also stretch shoulders on this day by sinking all the way down in the dip position and let gravity do its job.

I know you are doing high reps now but I want you to switch your workouts into the low rep range and work up.

Ps. yes there is no incline movement on purpose.

repost your diet so I can make some changes. I wanna add white rice pwo and probably somewhere else too.