Maybe it's the way you use your phone or the screen protector you got. I have had my galaxy 10 + for about 5 months with a non factory screen protector and is perfect. No scratches. The fingerprint works well and no peeling of the screen protector either.
Maybe you're lying. I've had the 1,3,5,6,7,8,9 curved screens. Flat screens before and after gorilla glass. None have scratched while wiping dust or while in my pockets with keys.
You should get a replacement. All those issues shouldnt be happening. You probably just got a jacked up phone take it back and get a brand new one and you should be fine. I had to have my s10+ replaced at sprint because I was having issues and now mine is great