You don't have a sad story! It is just a learning experience. It can be frustrating but fish out those catfish, keep catching and removing bass until they get noticeably fatter and larger(poor man's relative weight chart)and get some more bluegill in there. I would say from your numbers you have not taken out enough bass and definitely did overkill on the grass carp. If you can remove some of the carp I would. We have a 6 acre lake and we put in I think 5 carp and they have kept up. #1 priority is get rid of catfish. #2 reduce # of bass. #3 get more bluegill #4 see about taking out some of the carp. #5 feed those bluegill. Good Luck and believe me you will see results in a year if you do these things. It just takes time.