I tried to get into tk via ruby-tk.

I ended up really disliking tk.

Using ruby-gtk2 and ruby-gtk3 was much nicer. (Sadly, gtk4 sucks, so that's the end of the story there.)

I kind of want a universal toolkit that works everywhere and is also good. Right now I use ... well, either the web (that's ok, though I hate how I can not easily open local files and so forth, without having to use node), or swing via jruby-swing - which semi-sucks, but it also works on windows and it actually is not that bad. (I could use javafx etc... but it is so much easier to get started with swing). I also use libui-ng which is ok but lacks many features, sadly.