went thru same experience  two years ago. i got frustrated so i bought a Hisense 4k 55inch tv and its been great for me my card overclocked lets me run Ghost recon wildlands 4k 60 fps with custom settings no complaints for the $450 i spent. 

Moving to General Hardware

MaverickSY19
The Samsung CHG70's, I own 2 of them and they both have a little bit of backlight bleed, one is better than the other which is the one I use as my primary monitor.  Neither of them had any dead pixels though.  Backlight bleed is very common on these curved monitors you can read a ton of reviews on all of them and find that its a common issue.  Also some of the other brands even use the same Samsung VA display that the Samsung models you returned have! :)

So it is more common on curved? Since i am looking for a 27 inch i can try my luck with normal ones to see.

MaverickSY19
Not sure if its more common or not on curved, just know I did a lot of research on it.  When you are doing stuff on the monitor or playing games you don't even see any of the small light bleed that my Samsung's have.  Its only when the screen is black really that you see it.  One of mine had a really bad bleed for the right side that was like a flashlight out bezel almost.  I RMA'd it and they replaced the screen, the replacement was pretty good overall and that is the one I use now as my primary monitor of the 2.

Thanks for reply man. At this time i am just sad of this situation. Check the picture and u will notice it on games not so dark like Battlefront.
https://drive.google.com/file/d/1nQklkZtFKjYH6ZwWx3GDGjyN-HxQtANy/view?usp=sharing
https://drive.google.com/file/d/1fZTVU-nlN3qkuO7jfF5qXcP2e7vecNVG/view?usp=sharing
 
I don't want to just settle with this but i don't see an option beside keep replacing them until i win lottery.

Are you wanting a 21:9 MONITOR, or a large TV?
21:9 is hardly supported right now, and requires a lot of games to be 'tweaked' to get them to run right.
2560x1440 is better because it is supported more by almost every game, and can look very good with an IPS panel.
You dont need an Acer Predator to get a good monitor, you can go with a Dell IPS monitor, or an Acer XB27(whatever the latest # is right now), and have excellent gameplay (just remember to use a DisplayPort cable). Make sure to get an IPS panel with low input lag W/O hardware accelleration to get it to low lag times. 5ms GtG is fine if it doesnt use accelleration. And an IPS with 5ms gtg will look awesome over a TN panel.
My buddy just got a curved IPS panel. We researched all 3 of the ones he wanted (21:9, Predator, Dell, and Acer I think or maybe Samsung), and he ended up with the cheapest one which had the LEAST complaints on the panels, a Dell IIRC, and he has had 0 issues with it (it only goes to 100hz though, and thats oc'ed, which means hw/sw accelleration, but it will do 60-80hz NOT oc'ed, and thats what he plays at).
Also, if you are tied to 60hz only, then the Dell 21:9 is an EXCELLENT choice, as it has no issues on 60hz or 80hz. 100hz can have 'some' little issues. The monitors that OC to 120 and 144hz, do so at drastic oc'ed hw/sw accelleration, and give huge input lag, or spikes in gameplay,, and also can burn out very fast, and ussually have peak brightness VERY low to where everything is dark and an IPS panel that is dark looks like crud.
So, if you absolutely are tied to one or 2 mfr's only, then good luck.
If you want a curved panel, I would suggest the Dell monitor that only does 100hz, as it has the LEAST issues out of all of them.