Thanks for spending the time to report this disturbing assembly issue.
Not the BL experience that has made the brand so successful(!)
As a Bambu Lab potential customer I have not yet dropped my AU 3K plus on the H2D + AMS. And frankly I am underwhelmed BL did not give this obvious quality control/factory build issue much higher priority.
I think you had more than enough reason to have the printer exchanged without question.
I am leaving my purchase decision to near the end of the sale in the hope that early production issues have been resolved to minimise risk.
I can only hope that BL has reviewed their production line and QC processes to ensure this problem is not repeated.