Hello @ReillyBrogan, this issue is already being tracked at #9209. Closing as a duplicate.
So the reason I was saying it never worked is simple: I fogot to write that I use fractional scaling, I'm at 150%.
Integer Scaling (1x, 2x) maybe worked and was sharp before, but fractional scaling never worked good. There is only the option to not scale steam or to have a blurry UI. With KDE's "Apps scale by themself" (which is the only great experience for linux scaling right now) it is not even possible to have a blurry UI, people streight up can't read it and can do nothing about it, because steam doesn't support fractional scaling.
I have a similar problem, in that when I use fractional scaling, for many games the I get the game rendering in the bottom left corner of the screen and the rest of the monitor is black.
Nothing extracted yet.
Your system information
Please describe your issue in as much detail as possible:
After switching to the latest Steam beta I observed that window scaling is no longer working. My display is set to 200% scaling and the client was correctly scaled prior to switching to the beta. Steam is now ignoring the scaling setting resulting in a window that is too small to be usable on my display.
Steps for reproducing this issue:
Note that this is a regression as it worked previously and switching back to the non-beta channel causes Steam to start scaling correctly again.
Thread on the Steam forums with other users experiencing this issue (not sure why Lionking says it was working before): https://steamcommunity.com/groups/SteamClientBeta/discussions/3/3826413850821502932/