Why are these peaks so "sharp"?

Question

3D

Why are these peaks so "sharp"?

Answer 1

Normals in this place looked the other way.

Answer 2

You have duplicate vertices there, it seems. Remove with merge vertices -> by distance

Answer 3

Select the snap that goes along these points and look at the curves.
As far as I understand, you have nurbs and one section somehow floated.
In theory, you need to take the pivots of each point and trim them, now they are directed exactly along the edge