If you have a wide grip, you aren't improving the stretch of the pecs. Maybe try some dumbell presses, which will allow for a better pectoral contraction. I do a lot of close grip bench presses, but they are considered a tricep exercise, because they will fatigue before your chest does.
In my opinion, especially if you are going to failure, you are doing o much volume. 14 total sets just for you chest? 6-9 would probably be a more effective range if you are trying to train to failure on each set.