Well aren't you a little ray of sunshine? Bless 🤣
I've had the same tree back each year for the last three years, so it appears to be coping (and it is the same one, despite the necessary haircuts its had as it grows). If people stick them in front of a radiator and don't water them then yes they likely will, but it's not as if the shop doesn't make that clear.
For anybody who's interested in the rentals: https://www.christmasonthehill.co.uk/