I was trying to basically say that while I really can't stand it, there is no reason to not try it for himself because there are plenty of people who seem to love it. I'm not a 'MS hater' either, I loved 7 although I waited a year for the major kinks to get worked out, but 10 to this day I am not a fan of.
I'll share with you my evolution over Windows 10. I didn't like the default desktop, with the chiclet buttons, promotions of games and gadgets, the heavy-handedness of leading users to the option requiring you log on with your Microsoft account when you wanted traditional security in your private LAN. You quickly learn to choose the option for "this is a business or computer in my office" to get the traditional flexibility of account and password. I installed it on all my Win 7 systems as a dual-boot option, thinking I would play with it and hopefully feel more comfortable with it.
I found Classic Shell -- which now seems to upgrade along with Windows Creator/Feature Updates -- which would "break" it. Classic Shell enables you to have a classic Windows 7 desktop and start menu, with a menu item that will take you back to "Cortana-chiclet-city."
I didn't like that fact that they dumped Windows Media Center -- the very best choice for viewing even encrypted-premium cable-TV channels through your Silicon Dust HDHR-Prime or similar tuner hardware. this was another reason I maintain dual-boot systems as I explore a replacement.
Now I discover that the latest Feature Update now has ability to access my Silly-Dust tuners in "Movies and TV" with a crude channel lineup, showing which channels are available and which are "DRM." Eventually, I imagine now that the DRM access may be enabled through Windows 10, but Silly-Dust is still developing its HDHR DVR project, which works to view all channels with recording for non-DRM.
Windows 10 seems faster than Windows 7, and I have fewer maintenance tasks. The Windows Updates require less intervention. The worst problems I've had involved maintaining my dual-boot functionality after a Feature Update, but I now have a routine using a Rescue CD to fix the problem quickly after the feature update.
There are many things about the concept of Windows 10 we don't like so much. We don't see a certain future for it, and we don't know what MS's plans might be. There should always be a niche for it. We'll just have to watch.