That and the fact that even Windows guy Paul Thurott is saying now that it really needs a lot of work and should not have been released when it was. If he's saying if Windows 7 or 8 are working fine for you than don't bother with Windows 10 for now. The problem is there are way to many Computer configurations for Windows to figure out so everyone using it is really a beta tester.Paul him self has said its another example of Microsoft dropping the ball releasing a have done product. Don't be surprised when you start having problems. For me it was perfect for about 2 weeks. Then i started having all kinds of problems.
After being a Windows 10 user for over a month, I LOVE it. It's quicker, it's easier to navigate, and it's generally been a good experience.
But, all over the web, I'm seeing people say they don't like it, with memes poking fun at it.
If you don't like Windows 10, post why not here.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic