Something along the lines of "we are further investigating the issue to ensure everything is working as intended" might be a good thing to say instead of "absolutely wrong".

Given the bug track record here, for all we know it may have been a lucky coincidence that the auto-installer worked somewhere, and the experience reported by DosDawg, dolphin_jay and others may well reflect an issue that has been overlooked by the developers.

Therefore, support staff aren't generally see more supposed to get defensive of the company and offensive to the customer who's trying to use the company's products. The only person who might have a base for saying something like that is the person who created the installer, or the person who tested it cross-environment.