So good to see a dude accepting the blame for his ****-up...that is a brilliant start...i recently had the same issue...except it was the band that f'ed up in the recording...here's what i did... 1)
Soundreplace the bass-drum. This is the root of the kit for me. Get a good sample and get it in there. Don't run the kick thru the Drum-Buss. Let it be natural on it's own. 2)
Gate the snare and then beat the shit out of it. Through some EQ on it and get it to snap... 3)
i had no real overheads to deal with that were useful so i beat the shit out of them and the room mics with the Distressor and then cut a lot of the hi's from the rooms to get the "flare" of the snare from them. Don't forget that most of the drum sound can come from the overheads. 4)
Run the whole drum-kit thru a bus and then kick the shit out of that with ANOTHER
compressor. Then feed this to a some verb, plate or room depending on what you've got, this'll give you a fake room sound if you don't have one.
This managed to save the mix for me and the band loves it! i now imagine that there will be a series of flames that will follow my suggestions...only trying to help. Let me know if you need anything more...