I ALWAYS have issues with monitors/TV's.
Backlight bleed, dead/stuck/bright pixels, buzzing sound, dust under the screen.
I went through 3 Dell 1440p monitors before I was satisfied and kept the last one.
Here's my brief history with displays in the last 8 years.
First HDTV, Hitachi, stuck pixel.
Acer monitor, perfect.
BenQ monitor, stuck pixel.
Acer 120Hz 3D monitor, perfect screen but very rarely showed green graphical glitches until power cycled.
LG TV, perfect.
(OCUK) DGM 1440p, dead pixel(s), refunded.
Dell 1440p, 3 monitors with pixel defects.
Samsung TV, one dead pixel, unnoticeable from normal viewing distance so kept it.
Dell 5K, one dead pixel + a spec of dust under the screen. Will see what Dell say...
Call me picky but even a single dead pixel is unacceptable to me. You wouldn't accept a pair of glasses which have a tiny spec of permanent paint on the lens.