The shower drain was installed incorrectly - tolerate it or not?

Due to the contrast with the tiles, it stands out strongly. However, it wouldn’t bother me that much now.

One could consider not placing the fittings etc. centrally either, but flush with the false edge, so that it looks intentional.

Take what they offer you (or negotiate it up by 20 percent) and tick it off. With shower trays, the drains are also rarely centered and no one minds.

One could consider not placing the fittings etc. centrally but flush with the wrong edge, so that it looks intentional.

I think it's a good idea if it fits spatially towards the wall! Clearly, it's annoying and the tiler should have noticed and said something at the latest. But now it's the problem that a dismantling would probably not be proportional and furthermore carries risks.

In the end, it is also the question of what they offer and whether you really perceive it in the long run!? Thanks, kaho674's suggestion could help to better conceal this, if possible.

You can do it that way, but then it's just nonsense.
No, seriously... it does look ridiculous, but I think I would also be too afraid that it would only make things worse.
If something leaks afterwards...
Get as much compensation as possible!
And again the question, how the tiler can be so blind (stupid)?! Hard to understand...

What amount does the construction company offer you?

What amount is the construction company offering you?

They are offering us reimbursement for the price of the gutter, so around 500 euros.