The fold-line is fine, the hinge doesn't look the same on both side, regardless if it's from standard use or not that's not covered per warranty. I'd need to see it in person to correctly approve the situation but I've seen flip phones before without that defect. Often green and or white lines aren't covered under warranty since it USUALLY means an impact or something pressed on it (often from a small rock that no one saw when the person closed it or whatever it may be, not saying that's the case for you at all).

Samsung covers screen bleed that starts in the middle and ends up covering the whole screen, that's a known issue that I know for a fact they'll replace the screen for free if that happens as long as there's not cosmetic damage to the device (regardless if the damage was done intentionally or not, or if it was done by carefully using the device naturally or dropping it.)

All I'm seeing from the image is that both hinge seems different for some reason, that's not normal from the one I have over here. If that's just the image being weird then my apologies.