We had discussed this before, particularly trying to fix what you had originally created to learn from it. By scrapping and starting over you are just creating new problems and completely invalidating any feedback previously given.
I also didn't mention starting a new thread. I suggested adding to the OP, rather than completely removing everything that was there.
I don't advise trying to create your own lighting setup, just use one of the examples in the CSGO Sky List with the accompanying skybox texture that you feel matches the mood of your map. It looks more like your brightness value is too low than an "overpowering" ambient light.