Is Steam UI terrible? It seems a little slower than I'd like, particularly initial load but otherwise it seems fine to me. And most software I use is so slow now it certainly doesn't stand out and has probably moved to the upper grade just by not getting worse over the years.
Yes, it's absolutely horrible. It's just a browser and it's not well done. It takes seconds sometimes for clicks to register. Often I get blank screens and have to go back to reload the page I want. Everything about this browser-based UI is slow and cumbersome and brittle.
It's a Web-based UI which doesn't allow font size control or zoom, which deserves an achievement or something since nearly all of them allow this rather easily (either in UI or by editing CSS). Maybe a magnifier glass to help with the tiny font size.
What web engine is steam using? Has it always been a Web UI? I only started gaming on steam back in 2014, and it was a webui already back then so I'm curious!
It's a batty Mac citizen, with slow startup, weird fonts, the exact same UI as on Windows, and the shortcuts are all wrong. It's probably the same on Linux, where it's a Windows app on the OS as well.