To give you a serious answer, the most common cause is slower rollout of support for new hardware. Might be worth trying again if your first attempt was a while ago.

That being said, the default GUI installer does kinda suck. It’s really not for the faint of heart, but I personally install through debootstrap on my main workstation: https://openzfs.github.io/openzfs-docs/Getting Started/Debian/Debian Trixie Root on ZFS.html

As a recovering Leagueaholic:

Friendly reminder that League worked perfectly on Linux for many years. Riot yanked support for zero reason other than a generic “fuck you” stance.

Come vote with feet when you’re ready :); I can only speak for myself but the grass has been much greener.