arturpanteleev Hey men I feel your pain, I work on a modern laptop, so I know the feeling, but I been thinking about getting a gsync laptop just need to save up, I have a gtx 1650super in my desktop right now and it works fine for me, I starting to realize that you can pair any CPU with a GPU that works for you and you will be fine as long as the GPU handles everything thing with the display, that's where gsync laptops come in, they give the option of using the Nvidia GPU all the time even when not gaming.
There is a thread on here where someone was saying that their eyestrain went away when gaming on a gaming laptop, which means they get not eyestrain because the nvidia GPU in driving the laptop monitor.
So return what you have and try a gsync laptop, make sure that it has the option of disabling integrated gpu
And if you do, let me know if it's works.