As already mentioned, we can't complain about Kage either.... it went quite smoothly. Defects in the building savings contract were quickly and correctly resolved... but that doesn't mean there aren't mistakes there as well or that you don't sometimes get the wrong person (construction manager)...
Neither can we. Sometimes there are inconsistencies and we find the coordination partly chaotic, but all defects were recognized and resolved without any problems overall.
I can't understand that about Kage, the bricklayers and roofers are their own, why shouldn't it work anymore? All apprentices?
The roofers are a subcontractor, but the carpenter is usually permanently with Kage. Sometimes they also assign the bricklaying work to subcontractors.
The leader does not answer emails or phone calls. The expert's report was ignored (the expert writes A and B are wrong, the construction manager says no A and B are fine). They are supposed to send us the invoices AFTER completion of the work. They send them weeks BEFORE work starts. On the day of handover we meet on site with the construction manager and the expert: walls and ceilings were not finished, there were no interior doors and no insulation in the attic. I could keep writing, but I think this is enough ...
Sorry, but when I look at this post, I get the feeling that with every xyz somehow someone is asked or an email is written. Best of all, bypass the construction manager directly and try to speak with the "leader." This partly reminds me of posts here in the forum where a storm is made over some minor issues. What bothers you about the invoices? Into the folder and done. We also sometimes received them a few days earlier. Payment was only made when it was finished. There were never any discussions or calls from Kage regarding missing payments. They could have handed us those things at the start of construction for all I care. As long as I don't have to pay late fees or anything else, I don't care about that at all. Expert ≠ omniscient. We also had one who criticized one thing or another. In retrospect, it turned out that it was actually up to code. If something was wrong, it was fixed as already mentioned above. Sometimes only after a few weeks, but I never had to call endlessly to follow up. The handover situation was of course handled badly, but then you just postpone it? Interior doors + insulation in the attic are about 3-4 hours of work. So not exactly the end of the world. Walls & ceilings unfinished? What else is supposed to be done there after screed and plaster? All your points except for the handover date are minor issues.
For us, not everything ran smoothly on the construction site by far, but when I look at other discussions here, I'm glad to have gotten a company where you don't already have to tremble at the signature that the house will be finished at all. Building a house today and everything running smoothly is probably wishful thinking.