Coming onto this forum makes me think half the world population has one form or another of OCD.
Seriously.
The computer, is, a tool. A tool, to do work, or to browse the web, or whatever else you do on a computer. If you cannot notice the flaw in NORMAL, EVERYDAY USE, then why frickin' even bother about it? Pretty much 100% of all LCD screens out there will show some form of lightbleed at max brightness with a black background, it comes with the territory. The backlighting is done from the edges, that's just how things work.
Use your computer, it's not a work of art, just a piece of electronics that displays images and responds to your inputs.