32:9 settings for gaming

Hi,

I have an Odyssey G9 Neo (5120x1440 240Hz). I have been gaming on this monitor for 2 years now.

I am annoyed about the fact, that you cant use the settings you want to in almost any games.

My desired resolution for gaming is 3440x1440 (so 21:9 1440p). I like the performance of this resolution and I think besides racing games the 21:9 resolution fits games extremely well.

Nearly every game only supports full resolution or 16:9 presets if I want to lower it.

I mostly use windowed mode and programs like Borderless Gaming or NoMoreBorder to just use 3440x1440.

I was wondering if this is the best or preferred method you guys use or if someone can give me a lifehack to improve my QoL using this monitor.

I love this monitor for productivity and I do not want to swap it out for something else.

Whats your best practice? Split the monitor into 2 outputs via the settings? Just using the borderless programs?

Any tips?

Thanks!