I know the pain, I had a similar experience (although not with eight reviewers) when I published one of my works to the IEEE.
However I need to tell you something. Most of the times in life those people who you are seeking approval from are trying to encourage you, although it might sound counterintuitive. They can see a great potential in you and even though the first copy was good, they know you could achieve excellence. So they keep telling you is not good enough just to push your abilities even further.
I know it is very frustrated, I was constantly rejected by my mentor for about 5 months until I got something he said it was "pretty good". Then I understood that he was just pushing for more :)
Don't give up, you will make it!!