The guy you are arguing with is correct, every single thing you point out is entirely subjective and a matter of *your* opinion.
Take the OLED stuff for example, all display technologies have trade offs. None are perfect. It just so happens that you don’t like some of the OLED tradoffs. For me personally I would never look at the screen at weird angles so the far superior contrast/color/black levels of OLED far outweigh some edge case that I wouldn’t experience.
This is subjective.
It is like if you said that LCD is objectively inferior due to black levels. Taken in context of a single property sure, that is true. But comparing features of a technology you can’t just pick one metric and say that it is the only thing that matters.