Very great question, thanks!
Yes, I did try everything - I could not get back to the "old normal". Eventually I gave up, because, I think I have the very worst of the worst cases (I could find 0 devices which are perfect; even perfect devices became unusable eventually). What helped me - simply forget the life (I do not remember what it means to not have these strange sensations or reactions to screens/leds/whatever else that is flickering) I had before this and try to adapt ""to the new normal". And my life changed. I am successful now, I do not search for "possible causes of headaches in the environment". I can work (at some level), I can go to shops, see photos on other people phones. Of course - I still cannot use the "high-end devices". BUT I order new iphone, I order the cheapest Chinese screen I can find, I change it, Adapt to it by using it for 1-2 weeks and I am good to go. "The new normal" is much worse than what I had like 10 years ago, but it is much much better, than I thought, Yes, I get headaches from time to time, yes I use painkillers from time to time (at first I used them everyday, but now - once a every 2-3 weeks). I stopped searching for PERFECT device. I do not think it will happen. Ever. But I do not think about it anymore and enjoy my life. I still can work, I still have hands and legs and family. If I work too much - I will have sensations too heavy to be able to enjoy life. And that is a good thing - I spent my free time not looking at screens. I moved to management 100% because of this illness.. I optimize my work so that I do not have to look at screens and spend more discussing everything in real meetings, without screens. I think this illness introduced A LOT GOOD things to my life. Really important things in life like family, loved one, spending time in nature, sharing good moments, "just doing nothing with loved ones".
And still - I am big fan of new phones, tablets, eink tech, robots, rpa, power bi, programming and many other tech things. I even have small business built on this. I cannot use it, but it does not stop me from admiring it. 🙂
I am sharing the above because I really hope that sharing the above will help at least 1 person to overcome excessive stress this illness introduces when one understand they have it. At least until the time "the cure" has been found. 🙂