I laugh when it's cool to have a smartphone, use Google search, watch YouTube and get excited about the new version of iOS and Android or MAC OS and when MS releases a new version of Windows suddenly it's not cool at all. If you are so concerned about privacy then you must unplug yourself completely from the internet.
You can switch off many of the privacy setting in W10 after all. They are just on by default.
W10 performs better in every aspect than W7 and W8. And when DX12 games come out next year you will want to have W10.
It's always crying when a new version of Windows comes out. Same happened with 7. People were bashing it saying their Windows XP works better and they don't need 7. They even said they will never upgrade yet they did when their games stopped running well on it. So let's stop this crap talk we all know most gamers will upgrade to 10 at some point.