Edit: OK, I think I see your question.

Elon is much more explicitly/publicly on one side of US politics than Meta is. That's why people accuse his critics of playing politics (a convenient scapegoat).

Musk and his supporters project a lot. They have some neural condition or notoriety as popularity strategy or something that makes him/them hate everything, and they performatively state that "___ hates Elon"(often verbatim) out of that. It's not exactly organic.

I've never really noticed a difference in the trends for either. For the most part, all of the comments are about how anywhere but HN is complete shit and even HN is not as good as it used to be. There are always a few saying "but that's where everyone is". Inevitably, someone will post a link to something we all hate on constantly, be it one of these kinds of sites or a paywalled news article or whatever, and we're all just supposed to either know the currently working proxy or hope someone has already posted the link in the comments.

One thing I have universally noticed is it doesn't matter what it is or how many sides there are to it, someone always thinks HN is unfair to one side in favor of another. Usually multiple someone at the same time, and usually not even from the opposing side as each other claims.

And I don't know, maybe there is an 80/20 bias or something. I just don't know how I would or wouldn't reliably know that on intuition/things I notice rather than running the numbers on comment data.