In sorry, but they're kind of right. Windows is HELL ON EARTH to support. Fixing issues is a guessing game because no one really knows what's wrong, its garbage driver enumeration system means a year down the line a users monitor/headset/dock will magically stop working, restarting is a 50/50 shot of getting stuck on the spinning circle, I could go on and on and on.
Within three months of starting that job windows was gone from every PC I owned.