Tbh I just upgraded mine and it was running fine. Although turns out I was on an RTM build for months when there was a more recent one out so installed it.For those of us who are adults and can do a clean installation of Windows 10, it is superior to Windows 7. Also, if you must, there are a number of things you can do to make it feel more like Windows 7. For example, turning off Quick Access in File Explorer and also adding the traditional Pictures, Documents, Videos, Music, etc. Folders back to the Start Menu.
In my line of work, I've done hundreds of Windows 10 clean installs and dealt with customers who have gone the upgrade path. The upgrade sometimes works, but for the most part, the upgrade usually causes more issues. A clean install is the only way to get a true Windows 10 experience and unless you have worked with a clean install of 10, you more than likely aren't qualified to say whether or not Windows 7 is a better option or not.
At the end of the day, make the choice for yourself. Windows 7 is still great for a lot of people. It is supported until 2020 so there's no real hurry to change. But as for me, I have been on Windows 10 since it launched and have had a good experience. There are some things that bother me such as no "Computer" button on the start menu, but "Windows + X" gives me all I needed that for anyways, or the inability to create a shortcut to the desktop by right clicking on the program in the start menu. You have to right click ---> more ---> open file location and THEN right click on the icon to send it to the desktop as a shortcut. These are nitpicky things and I have learned to work around them and they don't really bother me anymore.