For example, I'm using Debian, and I think we could learn a thing or two from Mint about how to make it "friendlier" for new users. I often see Mint recommended to new users, but rarely Debian, which has a goal to be "the universal operating system".
I also think we could learn website design from.. looks at notes ..everyone else.
The Debian web site needs a good UX overhaul.
This is not a good UX. This is a demographic filter. You can argue that’s appropriate for a technically-oriented OS.
9front explicitly makes itself unapproachable to dissuade casual users, but I think Debian can and should be more appealing to mainstream, casual newcomers.
Your opinion, fine. So why do you want Debian to have more mainstream users ?