How to properly convert 1440p to 1080p without washing out/dimming the stream

I recently upgraded to 1440p OLED monitors, when I stream I have been trying to find the correct settings to convert the image quality of 1440p to 1080p. When I just swap the output scale to 1080p it sort of washes out the stream on the vod and when I’ve messed with the settings to try and correct this it’s either dim or too bright.

If anyone has any settings or tips for this issue that would be very helpful!