If you think you require a dozen reviews within the first 2 days after your upload moment to gain enough appreciation, you are wrong. Currently there just seems to be a calm season on the JJ2-Scene. JDC is off, no active tournaments are running, and there's not even an official level creation contest to keep people at least a bit active. Also there are exams and courses that will keep people busy enough from reviewing stuff. I guess you can just go on with your work and wait till Bash 12, then you will notice how much your work is appreciated again.

I highly suggest not to delete your uploads at least.