I have written about the subject of auto-voting bots (and how to improve Hive by adjusting the incentives to auto-vote) here and here.
However, to the best of my understanding, the upcoming hardfork (HF25) will change the curation incentives such that auto-voting will likely be redirected in a way that will actually be more beneficial than harmful (imho).
I discussed my understanding of the HF25 implications here
RE: Is Auto Voting Ruining the Proof Of "Brain" Tokenomics on HIVE and 2nd Layer Tokens?