Not that this is the perfect fix, but at least for sci-fi books you can usually look the Hugo Award winners[0] for ones that are solid. Not all of them are my cup of tea, but I have found that I definitely love some of the series that are found there. I'm sure there are other award types per genre that could help point you to some as well. Not that these can't be gamed, or sponsored or whatever, but at least it is a good starting point that is (¿maybe?) less prone to bot bias campaigns.

[0] https://en.wikipedia.org/wiki/Hugo_Award_for_Best_Novel

I strongly support this! For the last few years, I've been signing up as a Hugo voter, and read a bunch of great stuff that I otherwise would have missed. Sometimes the best books are a bit divisive, but still make the shortlist. (Saint of Bright Doors, for example...)

That was true until 10 or 15 years ago. They have been riddled with (accusations of) bias and fraud since then