Probably I can't, but I am not interested. Nothing that you cite bothers me so why should I work to disprove you? Like yourself said, this is what matters to you, not me. For me, the performance and interface changes brings much more value than what you put in your post, and I did use old Firefox but really was forcing myself to use it since I don't like Google hegemony. The new Firefox is for me a mobile browser that is finally a joy to use.
However, this is not my point. The Register does makes clickbait titles and clickbait articles. Of course this update broke some workflows (https://xkcd.com/1172/), but instead of getting data and saying that "new Firefox update broke this and that workflow, Mozilla is working to fix it" (this is assuming a good editorial asking for Mozilla input before publishing the article, not a tabloid like The Register), what we actually got is "Mozilla pushed a broken Firefox Android build".