@K-Moss the screen quality was really bad, screen door effect, you could see the pixels really bad in the sides of the screen and the motion blur was way too high, even with all the settings, was causing me dizziness. I believe a glossy surface would annoy me even more.
@Seagull I only tried new screens...I tried 2 models which were launched in 2018 if I'm not mistaken and that didn't helped....
I am now without a monitor and I'm using my Dell Latitude 5401 and for an hour or so I thought this is better for me eyes but I can notice that this also gives me eyestrain...not as much as a bigger screen I guess, but it's there. Especially when watching videos when youtube. I'm desperate...