you mention all of the hard work you've done, etc. if i remember correctly from other threads, you had what seems like, some eating issues in the past. if you are currently trying to gain muscle mass, eating in a caloric surplus is going to be necessary. are you comfortable with the fat gain that will ensue?
you mentioned above, that your bench press weight is stuck. have you tried a caloric surplus? have you tried a legitimate powerlifting protocol for working past sticking points? microloading? assistance work? negatives? working only the top portion or bottom portion of the bench (depending on where you stick in the actual range of motion)?