Well my brother ordered a new monitor and when we got it and plugged it in, it did this.
It is the darker spot on the bottom left and bottom middle. I thought at first that it was sort of like a bleed through, but I honestly have no idea otherwise. It reminds me of a shadow.
We have changed the cable, and changed a ton of settings but nothing seems to work.
I want to know what it is, and if it can be fixed by me (some random guy with next to no experience working with monitors). Or if I have to send it back because of a factory or quality testing failure.