It's not players telling other players to quit that sent WoW into an uncontrolled death spiral.

You're never going to have a hive mind where the player community agrees on what is best for a MMO (though there will be times they'll agree on what is exceptionally bad for it). If someone is not enjoying a game in its current state, then quitting to go play a game they do enjoy is the smart thing to do. Continuing to pay is passively saying "overall I am satisfied with game design".

It was developers paying more attention to their rock star egos than what players wanted that sent WoW into a death spiral. Even as subscriptions plummeted, the developers continued to ignore player feedback because they had decided they knew best. That's not to say that players are always right but when you have large groups of players leaving over very specific changes, you really need to stop and question if that was the right change to make instead of doubling down on it.

Blizzard chose to double down and they paid for that choice.

If you want to claim there were missteps in Endwalker, then state what you believe those missteps were. But also accept that there will be players who disagree with your personal opinion.