Display problems?

I'm very unlucky with my mobile phone display. For weird reasons this breaks again and again.

in the summer due to a fall (the display was replaced in a store that is not supported by Apple)

then sometime in October or November (since it was replaced again this time in the media market)

Now I noticed that my display is not exactly so with my case you can see that too and in the places where I then "fix" the case you can see with a black picture (background, Netflix, YouTube etc.) that it becomes bluish

Can someone explain why this can be so?

Malfunction (dead pixels)

Okay thanks, do you have to have the display repaired or are there other solutions?

If the pixels are dead, there's no solution.

Just have it repaired.

My guess would be that the display or the graphic display was not properly repaired by the dealers. Maybe take a look at MediaMarkt.

Okay thanks.

And what do you mean exactly?

By this I mean that I suspect that the display was not "repaired" properly. In that case, I would maybe go to the electronics store where the iPhone was last repaired and ask if this could also be an error in the electronics store.

Okay, thank you

With pleasure.

Can these dead ones spread or worsen pixels?