I tried it and the color change was ubearable. I'm happy people for whom this works have the option to install it but I do not want my OS changing my screen colors for me.
You did NOT really try it. The color change is adjustable to your preferences. You just had it set too strong if it was unbearable. You seriously didn't give it a chance and don't have a clue. I would be skeptical to accept any other recommendations from you knowing how much you're willing to judge things by very first impressions and even comment to others about your judgment as though it is valid.
I believe I did adjust some settings. May have gotten it wrong, or maybe there were no options to get results I like. I doubt I would just run it and not see if I could adjust it, but I don't recall quite what I did.
I dismissed it the first time I used it, but around a week ago I decided to give it another try and just suck it up for the first hour. By the end of the evening I had forgotten that it was enabled.
It really is easier on the eyes if you're often working in darker places (coffee shops, your bedroom, etc...)