I would rather donate money to Linux Mint, Canonical (Ubuntu) or the Open Document Foundation (LibreOffice) - which I do - then give another penny to Microsoft! I DO pay for my open source software. I support it (and write open source based software myself). Linux Mint is a great day-to-day OS.
IMHO, Linux Mint is a wonderful operating system and it certainly works for me. Both Linux Mint (Cinnamon) and Linux Mint (MATE) are lighter weight (memory-wise) than GNOME3 (used by Ubuntu, Fedora and others) but they are great too. Choice is good. That is not to say that Linux desktop distros are perfect. Far from it, but they are very usable. Windows 7 UI is intuitive to me. WIndows 10 is a strange meld of Windows 7 and Metro. Many people seem to like it but it seems unintuitive to me. Again, choice is good. If you like Windows (or macOS) then use it.
What is NOT good is that you cannot buy a (non-Mac) PC on the high street loaded with anything other than Windows. That is an enforced monopoly. It would be like being forced to have one sort of SIM card but being told “Well you can buy another type AS WELL if you want to!”
If there were well polished PCs running Linux Mint, Ubuntu or Fedora in (yeah I forgot your favourite distro!) then at least some non-techies would buy them. If children can use Raspberry Pi’s then non-techies can use desktop Linux. My family and friends do.