Well, as you noticed a lot has changed since Debian in the 90s. While Manjaro has a lot of problems, and while I’ve found I need to reinstall it every 6 months or so because I’m not very l33t, it’s still honestly very easy and very straightforward, and definitely better than Arch if you don’t know what you’re doing.
If you approach Manjaro with a plan for regularly backing up your data, you can reinstall it with ease whenever you need to, and the reinstallation will be fast and easy. It works out of the box with Steam, and it doesn’t ask you to pay close attention to it’s backend while not having the problems you noticed with Ubuntu, and best of all it’s free and it’s not Windows. I run Manjaro and I’m pretty happy with it overall, when though I’m sure I’d be better served with Arch if I ever took the time to really figure it out properly. Good luck, I hope whatever you pick works out well for you.
Because teenagers are dependants and the parents are responsible for their wellbeing. Since humans wish to and need to reproduce, society has ultimately decided (for better or worse) that the best way to protect everyone is to make children the responsibility of their parents until they are adults. The adults made the decision to have a child, and so that child is their responsibility until they child can be responsible for themselves.