Given how much flak Brave (and by extension Eich) gets on HN, it's somewhat ironic that you identify his departure as the moment when Mozilla abandoned its traditional values.
Diverse in nationalities and backgrounds, yes. Diverse in viewpoints, not so much.
The Overton window is quite narrow on HN, and I have the distinct impression it is narrowing further. Though I do admit that within that window, discourse is very lively, to the extent that a casual observer can easily be fooled into believing this is a place for free exchange of ideas.