BenQ PD2705Q, my new monitor, has no eyestrain feeling.
Monitor: BenQ PD2705Q (turn Brightness Intelligence on)
Graphics Card: AMD Radeon RX550
Cable: DP
OS: Ubuntu22.10
Remember to turn on Brightness Intelligence, that can reduce eyestrain by adjust brightness to fit environment light.
I switched from Debian to Ubuntu, then found Ubuntu is more eye-proctect.