Hello!

It is necessary to obtain a certain shape without unnecessary distortions and defects.

The shape is not complex: a rectangle with angles smoothed in a certain way.

The problem is that it is not possible to create a clean surface without visible defects.

I tried various construction approaches, but the result could not be achieved. Perhaps I'm missing something. After many attempts, it seems as if this form is not allowed at all

do, it's ridiculous) What's the mistake? How can you make this shape without defects?