You haven't heard?

You know what? forget it, lets go over this stuff.
1. P2P can easily be turned off. Do it, you loving fool.
2 and 3. Both are actual concerns, but all recent OS's have been doing some of this for years. If you're really not ok with it, then don't use Windows 10, OS X, ChromeOS, Android, or iOS.
4. Cortana's entire purpose is to be web-based, I have no idea what you think it could do without internet connection.
5. Turn it off, you insufferable moron.
6. WiFi Sense is... you guessed it... incredibly easy to turn off.
Wow look at that, 3 out of 6 features are able to be completely turned off. The Cortana issue is a non-issue and the other two have differing levels of ability to be switched off, and regardless, both are becoming more common in modern OS's. Not saying its a good thing, but its there.
If you're that concerned about your privacy, maybe you should completely go off the grid and live in the foothills of Appalachia or some stuff, at least then you'll stop bothering everyone else with your intense anti-circlejerk.