Was this linoleum flooring installed correctly, that is, professionally?

Hello everyone,
we are a bit uncertain about our new floor and hope to get one or the other expert opinion here.
We had a solid-colored linoleum installed in our newly built extension. The dry screed (Fermacell Powerpanel 1000x1250mm + dry filling) was installed by another company, but not perfectly level; instead, there are inclines towards the corners of about 2-5mm.
The flooring installer inspected it in advance and said this could be easily compensated.
The edges were chamfered off, a compound was poured and applied with a spatula. We were advised not to step on the floor for one day (which we adhered to). Then the linoleum was laid.
Now, especially at the wall connections, we have waves in the floor and also noticeable, smaller elevations on the surface.

I pointed this out to the flooring installer; he came and inspected the floor with a spirit level (1m) and a feeler gauge.
He then referred to DIN 18202 and said everything was within the tolerance of 4mm over 1m.

Attached are a few pictures.

Is this now professionally well executed and acceptable or not?

Whether it is in the DIN, I cannot say. but it does not look good.

DIN is DIN, not always great either

well. It may still be DIN, but chic is something else. He could have made the leveling compound flat, if maybe not necessary. Well then, what do you want to do? Once the furniture is in there and so on, it hardly shows anymore. So what. Hopefully it was inexpensive.

Hi,

Thank you very much for the responses. I actually found deviations of up to 7.5mm per 1m when re-measuring...

It really isn’t chic. It wasn’t cheap either. And the chairs at the dining area wobble in some spots. So it is not just a visual problem, which would probably actually fade into the background with furniture.
I haven’t paid anything yet, and now I have initially demanded corrections with a deadline. The craftsman company will probably not comply with that.
But as I see it, can I then safely only pay, for example, half?

You can become very stubborn about that. Since it is glued, he is not allowed to tear it out for you. It is now part of the apartment. Since it is not DIN standard, it must become DIN standard. If he doesn't do that, no money. Absolutely nothing. He will defend himself, threaten, etc. But no money is legitimate until it is okay. There is a flooring expert in the forum, a Mr. Klara, who may also get back in touch. He usually always comments on flooring issues. K.