user2025 some people bought pixel 10 eagerly intending to transition to GOS. Due to AOSP delay of 2 months they could not start their transition. They were possibly on old phones or they were excited for the transition, and are annoyed that they could not do it.
The delay of 2 months is a big fuck up from Google. While we can say "oh you should have waited", I'm not blaming people for thinking "well, it'll take a month or so, I can wait patiently" and then being annoyed 2 months later.