Another thing I do for restaurants on Tripadvisor is look at reviews by language (works better abroad than in the US). While it's a bit stereotyping, I find that if a place is well reviewed by reviewers who write in Italian, French or Japanese, it's generally more likely to be to my taste. I'll add other languages depending on context , so if I'm looking for a Mexican, filtering by Spanish reviews is definitely helpful.
And helpfully when filtering by language, Tripadvisor will show the spread of reviews for that language making it easy.
This seems to be the only approach that works anymore. Are all the negative reviews petty or entitled? Then probably the thing in question is fine.
Because reviews are sometimes fake, and often from people who don't know much or have a lot to compare to, the most useful thing is to filter for when people complain about what you don't care about.