Yes i did change the settings around and it did not help to make it better, do you have note 10 plus and is yours looking good? I do also find a lot of people with same problem online.
No, I have the Note 9 but my brother-in-law has the new Note 10+ and his picture quality looks good. However when I first got my Note 9 the picture was not as good as I had expected it to be, only to find out that the display settings were set at the lowest option. Which is why I suggested for you to check your settings.