Floor plan of a single-family house 240 m² with a partially built-over garage

There is basically nothing wrong with puzzling by yourself, but you have to be able to recognize your limits ... which often actually results from puzzling by yourself. Even the knowledge of integrating necessary preliminary structures, niches, wall thicknesses, etc. to enable all technical installations sets very tight limits.

The question was only whether the other draft here has already been discussed.

No, not really. If you read normally or pay close attention, then the first sentence is the question. The second sentence was a bold guess from me, not a question.

That one draft, we know it, right?! It was already discussed here once.

…and then writing again that I am confusing something…. Well… You would actually respond differently to that…

You are probably confusing something.

And now a little clarification, I think you need it. I was 100% sure that I knew it. However, I am not often in the mentioned forum and do not write there. In life, you can remember especially unpleasant and especially successful things. A beauty you encounter and also perceive, you will recognize again in a year. It is the same with failed things, such as art, that catch your eye because you don’t like them at all. That’s unfortunately how it was for me with your draft in June. I immediately remembered this labyrinth with the guest area and the study as well as this obviously missing living room for everyone. The forum there was not created to chat and wwi…. Ultimately, the respondents there are more the professionals who use their work breaks briefly to answer users’ questions and are accordingly polite, so as not to upset potential future clients. Here you are among house-building friends, and they are a bit more honest. At least it should be like that. Rarely professionals, but many with experience, experience, hobby and passion, or good gut feeling. It is not about taste, whether there must be an open kitchen, whether cellar or attic, whether a desire for a granny flat or a house without a children’s bathroom makes sense. It is not about wall thicknesses that a planner can regulate. It is about “space,” zoned spaces where each occupant can move and develop. Where daily work can take place meaningfully without anyone disturbing or being disturbed. Yes, the area must also be optimal in relation to costs. For that, a sketch is already very good for usability. Costs: If someone wants to build their little wooden hut with matches, then more costs will probably arise; this thought error (matches are cheap) should be dissuaded from the builder. Square meters should be where they can be used well or where they add value. Your argumentation about too many square meters is flawed: none of your superfluous square meters can be used otherwise. Your all-room is already unusable—there is a lot of dead space, and it remains that way. Or it is used unsatisfactorily. In short: you can’t tell that you have talent for designing a house. Just because you can operate a program doesn’t mean you can design. Unfortunately, you wasted half a year. Putting such a garage into the thermal envelope might have been possible 30 years ago—today a builder could know that without wanting to plan themselves ;) Maybe it has to come to this first, that someone tells you straight because you didn’t notice the obvious.

And switching the forum half a year later seemed reasonable in view of the fundamental opposition to one's own planning – but apparently that exists everywhere. In any case, there is no question of "back and forth" jumping (HeimatBauer).

Perhaps one really has to say it quite clearly: No, there is no fundamental rejection of one's own designs. However, there is a rejection of self-designed plans if there is a complete lack of talent. Then the time is wasted for all parties involved and what would be even worse: there would be a danger that you actually build that rubbish. Since we all like each other here, of course we do not want you to burn your hard-earned money and the penny only drops when it is too late.

We are still going around in circles and the OP has been going nowhere for at least half a year. Advice is at best taken cosmetically, fundamental basics are dismissed with many words and smiles, and we will probably see each other again in another forum in half a year.

What I already said before pointing out the long history, I stand by even more now:

My tip to the OP: Build the house exactly like that. You want it, you get it. No one inside has to be happy except yourself.

But that doesn't just happen by chance! Or are you also acting as a doctor because you once watched Emergency Room and Grey’s Anatomy?

My last post in this direction was deleted - and yes, we are simply not in the well-known groups of other platforms where such an "I once saw that in ER" approach is loudly applauded.

in view of the fundamental opposition to one's own planning – but this apparently exists everywhere.

That alone is reason enough to ponder whether there might be some wisdom underlying this fact.