How to change the floor plan?

If that were my architect, he wouldn't have anything to laugh about.

Don't be useless, you don't necessarily want to stand in the dirt when you want to go into the garden. But at least you could reduce them in size and instead plan a large terrace facing east. The committee wanted it that way too, but somehow the architect got the stands mixed up. There should still be a stand with an east terrace somewhere.

I would only very reluctantly lie down for sunbathing on my terrace right by the fence. [...] But if it doesn't bother you and especially your wife, then go ahead.

Whether my wife would rotate a floor plan by a cardinal direction for sunbathing as far away from the fence as possible is something I would at least question.

I even consider placing the terrace there a planning mistake, which only arose because the drawer house just happens to have the angle there.

I don't consider it a drawer design, but as I said, reverse engineering of the floor plans from a 3D building visualization.

Not useless, you don't necessarily want to stand in the dirt when you want to go to the garden.

That's the problem, in the south you can't get into the garden at all. It's already quite late, did I make a mistake? I thought the garden was in the west and the terrace should accordingly be placed there.

Whether my wife would rotate a floor plan by one direction to get the sunbathing spot as far away from the fence as possible, I would dare to mark that with at least one question mark.

Yes, as I said, that probably varies. I find that hardly anyone lies next to the fence when they can lie much more undisturbed in the beautiful garden at the back. Just ask your wife.
Rotating the floor plan only makes sense, of course, if you also implement ALL the changes inside. So swap the kitchen with the guest room, etc.

That is the problem, in the south you can't get into the garden at all. It is already quite late, am I mistaken? I thought the garden is in the west and the terrace must be placed accordingly there.

I also thought that the house opens towards the garden at the bottom of the plan, meaning south. So the house somehow turns away, and there will be no nice relaxing view into the garden either.

In this respect, kaho is right that if she rotates the house, unfortunately the room orientation will be even worse.

Take your wife and think this over calmly. Priority list, compromise and slowly growing impatience, an architect who is not one ... not an easy decision to backtrack.