News: LYC Rising demand for responsible rare earths is not lifting prices, says Lynas, page-94

I agree with your assessment - I certainly have my doubts as to whether or not it is a bot (although it's been here for a LONG time, possibly before AI became a real "thing").
I also have my doubts about its allegiances, and whether or not it is a paid player who is downramping constantly (and monotonously) without ever showing that it has ever held any LYC shares.
By far the easiest solution to your question is to do what I, and many others, have done, and just put it on permanent ignore.
Don't ever respond to it, and don't get baited by it. If you have it on ignore, the only evidence that it still inhabits this board, like the pest it is, is by other people responding to it.