Now to be clear, this is not a "twitter should moderate/not moderate" question. This lawsuit was twitter/musk saying "no one can report about what we are or are not doing", and is the exact reason for anti-SLAPP laws existing: defending a lawsuit, even a clearly BS one, can cost thousands of dollars even when you win. Hence anti-SLAPP laws mean that if you can show the lawsuit is BS, the lawsuit is thrown out, and the accuser must cover your legal fees.
Elon sued them for breach of contract saying they scraped the data while ToS disallows scraping and their breach of contract led to tens of millions of dollars in lost revenue since advertisers stopped advertising. There are a few other claims in similar vein.
The judge ruled that the suit has no merit and Musk is claiming to recover reputational damages under the guise of breach of contract. He is also not allowed to amend this and file again.
It is worth reading the judgement in entirety. It is well reasoned and written.