Cartilage-bound thread protrudes from the columella of the nose.

During the first surgery, it was hard to see because it was bluish due to the scab and the surgical pen, and
 even after the day the stitches were removed, that
 part didn't heal. Everyone told me to just leave it on for a while and say it was just a scab, but as
 the pen gradually came off,
 the wound in that area turned red, like an infection. When it came out, I
 looked closely and saw that it was not hair but stitches.
 So I went to the hospital and they said it looked like the cartilage-tied stitches had protruded out. Because of this, I couldn't open my nose again,
 so they gave me local injection anesthesia to cut the stitches by recoil, and took the threads.
 
But the cartilage-tied threads were there. Does it make sense for it to stick out that long
 and not just a little bit
 ? Didn't you put in less thread and tie the columella from the beginning? ㅠㅠㅠ
 
And even after pulling out the thread, the wound continues to not heal and
 now I have a white scar that looks like something is sticking out.
 Is this okay?
Because of that, discoloration occurred and a brown line appeared under and on the side of my nose.
 Is there any way to improve it? ㅠㅠㅠ