I don't know about the majority, but certainly a very vocal few. And its annoying, especially for a small number who seemed compelled to spam the same arguments across every thread discussing the new books. But that seems to have gotten a lot better.
I wan't the books to succeed and like what I've seen so far. Negativity is par for the course, however, in these kinds of online spaces. I don't expect everyone to have the same opinions and tastes that I do, and sometimes good and interesting points are raised by those holding different opinions. For those I don't find interesting, I don't engage. And for the occasional sea lion, I have the ignore feature.
I think you may be overstating the effect that arguments over nomenclature surrounding the new books will have. I don't think arguments over the what people "should" call the new rules that take place on gaming forums, YouTube, and other social media have much of an effect one way or another. I do think that it makes a lot of sense in terms of marketing for WotC to just use D&D in the branding. I went from "Basic D&D" to "Advanced D&D", left gaming and came back with 5e. I missed all the post WotC buyout edition wars and still find how the TTRPG community uses the word "edition" to be strange. Ultimately, I don't much care. I'll check out the new books when they are released and, if I like what I see, I'll buy them, whether WotC or the community uses "edition", "version", just "D&D", or "electric boogaloo".
Who knows. My guess is that there will be short period of people talking the new rules using a variety of terminology and the vast majority of players will soon just be saying D&D with the assumption of playing the newest rules, which will be baked into D&D Beyond and the WotC VTT. There will be diehard adherents to the 2014 rules for a variety of reasons and many of these players will make a point of using edition language to clarify that they prefer the older rules and some of them will be using it as coded language to indicate disfavor with the current rules.