In bodybuilding, the common use of muscle isolation leads to an increased rate of muscular adhesion. This can cause an increase in intramuscular scar tissue.
The presence of scar tissue is a precursor to decreased movement capacity and overall dysfunction. You must take your mobility and soft tissue quality into your own hands, literally.
The first rule of fixing your bench press is admitting your bench sucks. The second rule is that you must read this article and learn about the set-up, grip, ascent, and descent.