I once installed Ubuntu for an 80 year old Finnish woman who escaped the Nazis as a child running across a frozen lake. This was a decade ago. She took to it like a duck to water and said it was great because it made sense, she could easily install anything and it didn’t crash. Give your dad the chance at least.
Seriously. If this broke him it gets so much worse… but honestly op, this is how you learn what to do and what not to.