I dont know what it is..But i have got many scratch on screen and I had laminated it with good material but still the scratches are visible once I maximize the brightness to full..Is it normal?

Today I was on instagram and minimized it along with other apps and clicked on youtube icon and phone was just like freezed just could feel the hard press home button ..same screen on locking or unlocking tried to restart but in vain..it got normal a...