From my opinion the hardest thing for a new user and the thing that most people get wrong is distribution choice.

I die a little inside when people get a stale distro like Ubuntu or Debian and have driver issues and complaints that I know have been solved in the newer versions of their driver/desktop environment/app.

@system76's Pop!_OS seems the worst in this regard since they use a very outdated Gnome version

Also my stomach hurts when I see someone tries @manjarolinux