Both OS are hard if you don't know how to use them.
Both OS are easy if you know how to use them.
Linux's problem is fragmentation. There's not a single OS that many people are familiar with like Windows. Instead there's hundreds of different distros that all function in a variety of different ways. Even if a person learns to do something on Mint or Ubuntu, they will be completely lost trying to do the same thing on Fedora or Arch.