Maybe I found a solution to this.
I copied the cylinder without a hole and hide it, so it doesn’t get in the way. then I cut the hole with the supporting edges(picture 1,2).
After that, i put the shrinkwrap modifier on the object with the hole and selected the complete object without the hole (picture 3).
the corners now have no pinching and i can extrude the hole inwards after applying the modifiers.
Is this a common way to solve the problem or are there better ways?


