So if you're just using it for yourself you probably don't need to bother
I'm curious on which Linux did you encounter issues while installing Docker? I cannot comment on the (to me somewhat pointless) Docker Desktop GUI installation on Linux, but I can confidently report that installing and using docker engine on Ubuntu, at least, is quite trivial and clearly documented[0] on the website.
It also seems like Docker is now able to run rootless as well, so my nitpicks are actually more minor than I originally thought. It's still not daemonless, but it would work for my use case still I think.
Additionally, (and admittedly this isn't really Docker's fault), the default IP range for Docker's network happens to conflict with my employer's internal network, which is great fun to debug if you forget to change it.
I use CentOS, Ubuntu and Arch and have to regularly use third-party repos, PPAs or the AUR - this isn't a particularly uncommon thing to do when installing software. And it beats running a shell script, which is how k8s stuff works most of the time :P