First of all, congratulations. I believe many readers in this forum did not think you would make it. Because the starting situation was just so miserable. It could also have been the case that your houses simply could not be completed because the defects were so expensive or severe that at some point it just wouldn't be possible anymore.
Of course I am constantly in attack mode. The alternative – silently sinking into whining – was not an option. That may seem black-and-white and nothing in between, but for me there was no in-between. I am a perfectionist and not a half-perfectionist. That is not always beneficial – rather never, also work-wise. Don’t think that I am now sinking into "self-reflection." I know my "mistakes." For me, however, they are not mistakes, otherwise I would change them. Only with this stubbornness have I achieved what we have now. Giving up was never an option. As you yourself write, any other way would have ended worse. Despite everything, I suffered greatly and lost about 20 kg during these construction years. For 2 years every morning my stomach literally turns and I hang over the toilet for half an hour. That is still the case today, even though I constantly tell myself that it should now be okay. My stomach says otherwise or it hasn’t gotten there yet.
I think at this point the entire dilemma becomes clear and you can also see many of the conflicts that there were in the various threads.
1. You do not want to find any help in this forum at all. That is completely okay but then it is sometimes difficult, because the forum also lives from exchange. For you in permanent attack mode, that is naturally initially a reason for a counterattack.
2. It is very complicated to describe: I think you have to ask yourself whether your way was the only possible one to reach the goal (house completion) or not. For
you it was the only right way. But it obviously cannot be transferred to other people, because they are not you ;). That is why in a publicly accessible forum it is also in my opinion important to contradict you at certain points. This is not a blog and your construction progress and your handling of it is not 1:1 transferable. And no, I’m not saying that you present yourself here as a role model. I only believe that not everyone possesses your stubbornness and your ability to suffer. That is why other builders in comparable situations have to take different paths.
3. The question about what has been achieved and about the goal is even more complicated: Your goal is the completion of the house, come what may. That is legitimate. But one may ask the legitimate question whether it is worth it. Now you have the house, a damaged stomach and legal disputes. Your way is the right one for you. Others do not want to pay that price and approach it differently.
Your example with the doctor is actually not so bad at this point: If the goal is happiness and satisfaction, then the balance sheet for the doctor may not be so bad after all. She lost 5k € but that does not bother her that much.