a) they choose a certain very specific ideal as a target, but utterly failed to convey that to a majority of site visitors;
b) their picked target and path visually and functionally matched by like 90% with a thing already existing for decades previously and very familiar to a majority of internet users - with a regular forum with sections and treads;
c) they make fundamental errors even inside the scope of their own ideal and vision - like for example apparently not taking into account that software with identical name can have different versions;
d) while they copied forum structure (failure B) they also failed to envision (or did a mistake in that) how the ideal target result would look like a long time in the future;
e) they failed to acknowledge all of the above, reflect on and fix own mistakes, instead they declared those mistakes "a culture" and persisted in deepening them;
Basically they picked a forum format, known at those times to literally everybody on the internet and decided to use it to make something vastly different, while failing both at communicating that intention and also failing at actually adapting UI and tools to better suit their target.