There are already some things, the base waterproofing is probably the most serious. The canopy? That should be clarified, that would be very strange indeed. The back wall, here the question arises for me: can you see it with the naked eye? If not, then I would rather not let them touch it.
The patio doors, okay that they are now even only 1.99m is also annoying again. Regarding the step, however, I wonder, it should normally refer to the finished floor, right? It is now about 25cm, can you only have 5cm of floor build-up there? Whether they should have offered you the doors higher, that would probably have to be decided by a judge. Incidentally, you would probably also have to prove that it was never offered that way.
Let's hope they manage to turn it all around for the better somehow.