Proper UI Scaling/Proper Borderless Mode Support for the Tiny UI at UHD Resolutions?

[Gamer]

Everyone with a UHD resolution monitor and played Gmod before already knows that playing Gmod at these resolutions is a nightmare.

Gmod and Source games in general have terrible borderless windowed mode support for now, the window doesn't stretch over to the rest of your monitor's screen when you select borderless mode, instead, it just sits at the center of your screen with no way to move the window. This is an even worse support than the normal windowed mode.

I don't mind using 1080p or even 720p resolutions if Gmod had proper borderless windowed mode support to play it, pose something for a screenshot then switch to a UHD resolution merely to take that screenshot then switch back to 720p/1080p for another screenshot. But as I said, borderless support is terrible for now. I don't know if it's just me, but Gmod feels like "borderless" when selecting the "full screen" option, but only if it's set to your monitor's native resolution (in my case, the monitor's native resolution is 4K so the UI becomes very small), but if you select like full screen with 1080p resolution, the screen will blackout for a few seconds as in when entering exclusive full screen mode like the majority of games do.

Borderless mode would be extremely handy for a game like Gmod where you constantly Alt+Tab and switch between playing the game, watching videos such as tutorials or subscribing to addons for it (I don't know if it's just me, but when I browse the Steam workshop through Gmod itself and not through the browser or even Steam itself, the in-game browser has extremely low FPS. I don't think the addons that I have are causing this, because even before I subscribed to lots of addons, I still had the exact low FPS in the browser. My brother also has the exact same issue, he has a completely separate PC and he has barely any addons since he doesn't play Gmod that much).

Any chance for proper and official UI scaling update by Facepunch? FYI, even some mods derived from Half-Life 1 such as Natural Selection 1 now have proper menus UI that scale at any resolution thanks to Half-Life 1's 25th Anniversary Update that added proper scaling for the menus, so I'm hoping for at least a 20th Anniversary Update for Half-Life 2 that adds proper UI scaling so that other Source games that are still being updated (Gmod being the most important out of them all) could possibly adapt from it. The extremely small UI is the very reason why the overwhelming majority of Gmod videos on YouTube are not anything higher than 1080p resolution.