In my anecdotal experience, a lot of such people don't really read 100+ books; they go over the letters of 100+ books.
I'm not here to judge though, do whatever floats your boat. Personally, I feel a lot of the "100+ books a year" appeal is in the social aspect of "look at me, I am smart."
Well, I might have done a lot more other things than boasting around on social media about the number of books I read. We were discussing books here, and I was just delighted that I stumble on others reading more than me.
[Redacted] Sigh!
Maybe just that what you consider bitter I consider quite matter of fact. This is a cultural difference; if you work with Europeans, you'll encounter it a lot more.
What it adds to the discussion is raising the question "why would you want to read 1000+ books a year?"
Finally, I'm not sure why I would delete the comment. If it makes you uncomfortable, I'm afraid that's on you...