I’m not blaming users for the “issue.” I’m trying to help people with the same issue I had. It was annoying. I found a workaround. It has helped fix this issue for many others in this thread that have confirmed the workaround fixes this issue for them.
And, no, the SDR slider has nothing to do with HDR. Turning it to 0 still gives games and videos that support HDR content the ability to use HDR.
The SDR slider brightens non-HDR content. Your desktop, your web browser, 95% or more of your apps do not support HDR. That slider is a gamma correction for that SDR content. It does nothing to HDR.
If you turn it to 0 HDR is completely unaffected. Then use your video card specific gamma settings to brighten SDR in Windows and the overexposure goes away.
I agree you shouldn’t have to do this and it should be fixed. But I’m trying to provide a workaround so people can do more than just yell at Microsoft. Because as you see that hasn’t accomplished a lot.