It's a lottery to get a good 34" ultra-wide which has NO "backlight bleed" or "IPS glow" right now.
But to be 100% honest, it's to me a little silly to complain about a little bit of extra light in the corners.
I own the 34UM95 from LG and I do have a little bit of corner glow, mostly worse in the left bottom corner. But the times I'm running the screen in "near full black" which is the only time I see it is about 1%-3% of the time.
These monitors are not for gaming, which is where you would mostly see the corner glow. If you want gaming performance and no backlight glow, then buy a non-IPS monitor.