And the whole "I'm proud of being a curmudgeon " is exactly the problem being identified by others in this thread. It's like you weren't even reading it.
Consider this: Word Processing, and Word Processor UX was a solved problem from his perspective 20 years ago (he is far from alone in this opinion). Quite honestly, I have no idea what Word today is doing for me that the Word I was using 2 decades ago wasn't already doing.
It isn't curmudgeonly to say that a product has reached maturity, and does not need changes. This happens a lot outside of the computing realm; a screwdriver from 50 years ago is basically the same as a modern one. A mechanic using his grandfather's screwdriver isn't "proud of being a curmudgeon" they are just using a perfectly good tool that doesn't need updates.
So perhaps they are not wrong and newer doesn't always mean better.
I understand millions of people are able to use ms word. I just can't work with the UI. It even makes me angry and aggressive. And that's not an easy thing to achieve.
Would you agree that a "new" TV that requires an internet connection is worse than a ten year old TV that just works?
Would you agree that decades of UI research are discarded by supposedly "new" and "modern" computer interfaces?
A big thing that came with the roll out of OOXML, along with the controversy, is that all of the weird serialization corruption bugs went away.
In my opinion, the quality of MS Word peaked some time in the early 2000s.
So today, given the choice between LibreOffice and MS Word, I would always choose LibreOffice, even if MS Word were free, and despite the fact that LibreOffice Writer has some annoying bugs that have not been fixed for many years, but I find easier to work around those bugs than to cope with the user interface of modern MS Word.
On the other hand, I agree that MS Excel is clearly superior to LibreOffice Calc. Nonetheless, there already are decades since I switched to LibreOffice Calc and I did not need the extra features of MS Excel. For things beyond the capabilities of Calc, I use a real database, though that would probably not be the best solution for a typical office worker.