Well if you bled the system properly and that didn't fix it you have about 3 options left. New MC, new SC, or a broken finger on the pressure plate. My 02 actually had 3-5 fingers fall off when I got stuck in 8" of loose sand and decided to quit all together after I was about a mile away driving on the road. NOTE, I had almost 200k on my MC/SC.
I'm guessing you're using the OEM clutch still? When it was working, did the RPMs rise in 5th but vehicle speed didn't go up like normal?
Have you been launching your car? lol