Fedora is the better example there. (i literally say that it's the glimmer of hope there lol.) It's an actual utility slash app that will do everything, and not just a file that's just thrown at you with no pointers.
(Though even fedora's download page could use a more clearer "How to install" link next to the iso links there. cause even clicking on Documentation there isn't gonna lead you to an installation tutorial or even let you easily find one there without digging. and even what's written where is either not that great or just doesn't exist lol. like, i would just straight up disagree on docs being friendly in regards to install process. though maybe that's not even necessary cause you're just gonna boot into the installer that'll take you through it. and again, it links out to github instead of actually downloading it right there, which only adds unnecessary confusion. how hard could it be to actually split links per platform? this is again the sort of thing where some people there might presume that 'users will just figure it out', that they will hunt out the correct file there on a page that looks nothing like previous one and is more geared towards devs, even though it could've been streamlined further. putting media writer higher up on the page is a nitpick, lack of a prominent installation guide is not, cause it's not linked to, and it also seemingly doesn't even exist. there's https://docs.fedoraproject.org/en-US/fedora/f36/install-guid... but not for a more recent version, i guess it just got lost in the shuffle.)
Some Linux distros aren't really doing as good as they could be at making things more accessible to a wider audience and less proficient users. And so the install base stays where it is. I don't think it's extremely nit picky to point out that just linking to an iso and expecting people to just figure it out without even clearly linking to a tutorial is not very accessible. And it really could be as simple as just actually having a link that says "How to install" or "Installation guide", and it's baffling when that stuff is buried. People could use trying to look at these things from a perspective of a new user who's not familiar with these things, and not just from someone who's in the know. Cause it's not actually intuitive or accessible having to dig around a website, trying to guess which of the links would take you there. (other downloads? documentation? support? none of these are an actual guide, and sometimes you won't even find a link to a guide there either.) There seems to be an assumption that just giving an iso file is enough, and that assumption is incorrect.
For example, Debian does kind of a bad job there cause it just throws an iso there and leaves you to poke at other links and guess, the installation guide there is buried under a bunch of clicks for some reason. Ubuntu is pretty good (though im still baffled why won't they feature their desktop version even more prominently on their front page. now that's an actual nitpick), and it actually outlines 'how to install' right there next to the download, and has an actual link to a more comprehensive tutorial too, that's laid out pretty nicely as well. (that's pretty much perfect really. though some other flavors of ubuntu might not be as great there.) Compare https://www.debian.org/releases/forky/amd64/ and https://ubuntu.com/tutorials/install-ubuntu-desktop (both also first results from google on 'distro name how to install'). Debian's idea of a guide is kind of diabolical in comparison. It looks intimidating, it's plainly a pain in the ass to navigate, it's not laid out well whether you a new user or even if you know what's up, it's easier to just give up on that page and look elsewhere for something better formatted. But hey, maybe Debian isn't even really meant to be all that accessible or to be for the kinds of users that ubuntu might cater to. Or rather, it just won't be, if it's gonna be like that.
Windows is quite easy to install. They have a media writer too and their installer is pretty straightforward. It'll even do an in place upgrade that will just work. They clearly have considered OS installation, and have a couple of different tools available for it. They also still sell usb sticks with an installer on it.