As much as I wish Google will get fucked hard due to their greed and incompetence... I don't trust StatCounter graph one bit.
Please do know that StatCounter gets their data from websites that have the statcounter code installed. That is how they derive these data as they refer to our site's referral data and so on.
And who usually installs statcounter code? The small-time publishers, or us... You don't see big sites, especially the authority ones, install StatCounter code. I also doubt Reddit uses statcounter.
And because the past update, especially since September 2023 HCU, have killed so many small publishers sites, it is bound to show this as our sites are lost in Google but still ranking in "Bing" and whatnot.
So it is very likely the data is not 100% true at all.
However, I also must point out that many users have also left Google Search and use others as Google is just too distracting, full of ads, and giving poor irrelevant results. I've been reading comments at Youtube, Tiktok, Reddit, and so on and many have shared they are using ChatGPT, Bing, Perplexity, DDG, and so on instead. So yeah, there's definitely a drop in Google's dominance in search, but I doubt it is that bad.