degen It is true what you say, I do pay a lot of attention to things like hinting, etc. The fonts on my device are very crisp and I will make a font suggestion. I found iPhone devices to have blurrier fonts in general due to the way Apple does things but there is also model variation. I do make changes from the defaults though keeping in mind that sometimes it is just the device that is problematic. Here are a list of changes to make assuming you were holding my exact A70 device on Pie: in display settings "Font size and style" move font size blue slider all the way to the left to be able to count properly then move it two clicks to the right from that position. For Font style, change it, I have "HelveticaNeue" there, and yes I paid for it from the google play store using my free credits it's only like $2 who cares but if you want to do a free one first, Samsung Sans is decent but Helvetica Neue is better (https://play.google.com/store/apps/details?id=com.monotype.android.font.helveticaneue&hl=en_US&gl=US). Then in display settings under "Screen Zoom" have the blue slider in the exact middle of the range. Ironically, doing all this will make it look like an iPhone or M8. Then for screen brightness that is for comfort, a good way to adjust it is on a webpage with lots of small text.. you want to adjust it so that the smallest text is sharpest this is usually going to be in the 50% brightness zone and whites should look "neutral" as a result not too dim, not too bright (for videos you'll want it brighter though). During the daytime I don't use dark mode or blue light filter, but I do in the evening/night. For blue light I usually have it one click to the left from the starting point of the slider furthest to the right (in part because often I'm in complete darkness for this). When you're in pitch black, you'll have to adjust the brightness to be just a smidge above the lowest setting. Yes, you will see some flicker on scrolling, but in dark mode it's not as noticeable. Use the Samsung Internet Browser too, it has a very good dark mode and knows to auto-activate when the system mode is on as well, and you can control this separately.
The font used does matter. Hinting issues from font to font aside, I do the same thing with my PC and know exactly what you mean by tracking. Some are too round, some are too narrow, some are too squat, etc. So for example in Windows, I have to get the scaling right. So on my 2048x1152 monitor (comparable to 1920x1080) 23"-24" I have Windows set to 150% scaling and on top of that inside a wordprocessor like LibreOffice I have the scaling inside that application at 110% and then I pick specific fonts from there and I also made my own themes too, I don't use the stock white background.
The glasses you wear matters too. Did you know that when you get a glasses prescription, you can also specify a zoom range? Guess what? The new glasses I got recently, I only wear them outdoors not indoors. Why? Because I said I want them for distance viewing and that I would get reading glasses separately (though progressive lenses would have been an option too). Well, turns out on the new glasses with text at PC and TV viewing distances, my left eye is crisp, and my right eye is blurry. They also seem to make everything slightly smaller at closer ranges due to a telescope type effect. So as a result, I use my old glasses indoors which is annoying to me, but live and learn. This was a new opto, and my old one which retired used to ask how far away is the object you work with the most and I didn't remember that until my mother reminded me (who went to the same person). So sometimes, it is also the damn glasses with the wrong zoom!
Edit: Degen, I added two screenshots here so you can see better what the output looks like, first one is just the main settings pane, and the second one is this post in "mobile" view. It'll look sharper on a smaller screen. Settings app and Mobile view of this post