Bathtub misaligned - defect?

I believe you get used to the direction the tub is facing relatively quickly. Although I can absolutely understand that you don't want to lie with your back to the door. For example, I really don't like sitting in the office with my back to the door at all, and I even have 2 doors/passages behind me.

If you can't live with it at all, then I would have it changed. Otherwise, you will always be annoyed.

yes, we had a similar experience but rather due to other "issues". It is said that one feels safer when having the door in view and then can relax better (one should also always offer the seats with a view towards the door to its owners). In your place, I would arrange a piece of furniture between the door and the bathtub that serves as a kind of "imaginary protective barrier," for example a room divider. Then you have a defined area

Thank you for the numerous feedbacks...

We will talk to the builder next week, also to see for what price we could change it. The tiler has to come again anyway because he needs to fix something in the guest bathroom. So if it fits the budget, we will have it changed.

I have one more question since I have read here several times that it is better because of the drain... Unfortunately, I am not really familiar with it, but isn’t it the case that the overflow is connected to the drain valve of the bathtub and therefore it doesn’t matter at all where the overflow is? At least that’s how it looks in the pictures when I search on Google for "Überlaufgarnitur Badewanne".

All your objections are subjective. Subjective opinions cannot be defects. Bathtub works technically, so then... Didn't pay attention and didn't hold on, so then...