I'm having the exact same issue with pushing so hard, I'm waiting for the screen to crack.
I even reluctantly removed the screen saver (that was so precisely installed by Samsung) and that didn't help. And as I expected, I was unable to replace the screen saver without air bubbles. Ugh. When I see videos of other users demonstrating the "proper" way to use the FPS, it looks so effortless. I need to perform the finger touch with vice grip like pressure to finally get an unlock.
I'm going to swap it out for another under the assumption that this is defective.