I haven't used 34" 21.9 screens but on all the other IPS screens I have tried, IPS glow has never really been an issue with a sensible brightness setting and backlight strip imo, only an issue when on dark content and viewing the screen from an angle in my experience.
Supposedly LG has addressed the backlight bleed issues at the production line for their panels although no idea if that is true or not....
TBH, for the price of the Samsung, if I where you, I would be willing to try the acer 34" freesync screen out instead, should be better "overall" aside from blacks/contrast ratio and build/looks and I haven't actually seen many people complaining about any IPS glow & backlight bleed issues.