People dunk on Purism and the Librem 5 because:

• Purism is shady AF (Louis Rossmann talking about it. Them being a cult Techlore explaining why Purism is garbage.)
• Their phone is way worse specs than similar products, such as the PinePhone Pro, the Pro¹ X, the Fairphone 4 and the Volla Phone, and for a significantly higher price (in fact, the Librem 5 is more expensive than even the iPhone 14 Pro Max, the Galaxy S23 Ultra and the Pixel 7 Pro).
• Even though they are years behind on their preorders, they are now launching a “new” phone with pretty much the same specs and double the price ani, you guessed it, it’s available for preorder, although it’s not even developed yet.

To summarize, Purism is a cult that sells iPhone 8’s for more than iPhone 15 Pro Max prices and then doesn’t deliver or refund them. My old Huawei P10 Lite has better specs in every single way, and it cost one sixth of their price when it was released six years ago.