It’s difficult to be disappointed with something that is free.

Actually, one shouldn’t be disappointed with things. Only people can disappoint you.

I was disappointed in the Debian crew when they standardized on systemd when it clearly wasn’t ready yet.

And I was disappointed in the people running some distros that made Wayland the standard when it clearly wasn’t ready yet (a few apps I rely on don’t support it or run poorly on Wayland even now).

Other than that, free software, free choice, and a lot of learning possibilities. You just have to adapt your expectations. Change hardware, change software, change distros, and learn.

All of them.