First, most modern research in physics (especially experimental physics) have a ton of coauthors; we’re well past the stage of things being named for a single person.
Second, what makes you think there isn’t great fame in disproving dark matter?
The last person who figured out we were doing incomplete math is the single most famous scientist in the history of the world. Being the next one isn't more exciting than getting some particle named after yourself?
Yeah I interpreted that person’s post as saying “we’ve been doing incomplete math this whole time” is way more exciting, which I completely agree with.
Second, what makes you think there isn’t great fame in disproving dark matter?