may b you should try this routine
Full Body Workouts
day 1 = maximum strength
day 2 = endurance
day 3 = cardio
day 4 = hypertrophy
day 5 = speed strength
day 6 = volume (10x3 of Chad Waterbury's Next Big Three"
day 7 = rest / cardio
day 8 = repeat
i don know: it worked well for me + u said you have tried everything, so give this a shot...
for specifics: pm me and i'll send you the routine