Ended up installing Garuda instead since it does most of the work for me when it comes to building an Arch-based OS for gaming. It mostly works except for some minor issues, a major one, and a show stopping one.
For one, the kernel completely stops responding to even Alt+SysRq+R-E-I-S-U-B when validating my Wallpaper Engine install in Steam and I don't know why. I found a plug in that allows it to work in KDE but I can't even get that far if I can't even install the app. I just ended up not installing it, but I'm still looking for a Linux-native app for animated wallpapers.
Secondly, I have this weird flickery-ghosting effect when playing games in fullscreen (Well, actually just Helldivers 2 cause it's the only game I've tested so far). Borderless windowed is fine but then there's a distracting thin white border around the window.
Thirdly, I can't even begin to comprehend how OpenRGB is supposed to work. It's like trying to understand a foreign language, especially given how intuitive and easy to use SignalRGB is (Windows exclusive). I can't even figure out how to use OpenRGB to simply disable the damn lights so I don't have to deal with it.
Fourthly, the Nvidia X Server app is missing almost every single feature that Nvidia Control Panel has. Where are the 3D settings for games? Where's the AI stuff? Where's RTX Video Super Resolution? I didn't spend $1800 on a GPU, only to not be able to use it to its fullest.
And most importantly: HDR is completely broken, which is a show-stopper for me. I'm too used to HDR to go back to SDR, especially in movies or games. Turning it on makes the desktop and all SDR content look dull and washed-out on an LG C1 OLED, like a faded photo from the 1970s. It's obvious that KDE isn't properly mapping SDR colors to an HDR space. The SDR color intensity slider does nothing, either. HDR works perfectly in Windows 11, even when showing SDR content.
tl;dr: I don't actually expect any help; just wanted to vent. I'll figure this shit out eventually, but until then, I'm dual booting Windows 11. From what I understand, HDR support is still in its early stages for KDE. So I'll check back again in a few months to see how things have improved. Anyway thanks for listening.