Then you and I are talking to different people. Fortunately, I don't work in JavaScript for employment any more. As a frame of reference just the mere mention that a site could be 50-200x faster by dumping React creates conflicts of interests for impacted developers and the results are typically not immediately welcoming. That isn't shitting on anybody's work, especially if you provide guidance for improvement, but if a large group of developers cannot function without React their perception of "shitting on their work" will be less objective.

It doesn't surprise me that you got a lot of people upset at you. "Dumping React" is not a viable strategy for the large majority of organizations. This would be like saying that you could improve performance by rewriting the backend into Rust.