Ask HN: How to handle morally superior engineers

I’ve got a team that is building a product that is mostly not meeting any definition of success. The current team is hiding behind what I would consider ‘moral superiority’, where they point to ‘well this app is very complicated and you won’t get it’, ‘we are following best practices from top companies’, ‘we are real engineers’, etc. None of them are faang, for if they were, they would faang themselvss to a FAANG by now. They bring no notable experience either, nothing that would impress anyone.

The product(s) are not meeting any acceptance criteria. What is the best way to tell them to shut the fuck up?