I understood that this was what they (interviewers) complained about and he got an impression about this by hearing their stories?

Yeah I knew plenty people at ASML at the time. I wrote my comment a bit too condensed there, the interview wasn't my only exposure to the place. At the time it was very chaotic (for good and bad), the codebase was awful, there was plenty armwrestling but to my understanding it was mostly armwrestling about the tech, not about island building and the likes.

Like just as an example, they made sure that by every coffee machine there was a whiteboard for general use. The idea was that if you ran into someone at the coffee machine and got talking and suddenly got an idea together, you could immediately jot it down and geek out about it together and work it out in more detail, right there and then. No meeting to plan, no project manager to involve, just work out your idea together. That's not what you'd expect in a company with lots of managers protecting their little islands.