Carpet Joins on wide widths

[Jothetaxi]

I wonder if we can get some opinions please? we are having our carpets fitted and have come across numerous issues with the installation.  The carpet we chose comes in a wider width of 5metres. In our bedroom they have installed it at a 4m metre width and added a join at the point of the opening of the bay window.  Into the bay window the width would be 5.2 metres.   The concern is that the join will fray, as it is a traffic area (moving into this area to draw curtains and there will be furniture etc). What are your thoughts? we expected a 5 metre carpet and a small join somewhere more discreet.  Picture attached, which shows the carpet pulled up, because they also left a floor board loose which they agreed to fix down.