> search has mutated from 'locate the exact item I'm looking for' to 'show me a list of semantic search results'.

Years ago Amazon intentionally nerfed their own on-site search into complete uselessness. A step at a time they removed the ability to exclude a term by prefixing a '-', then they removed grouping terms into a phrase either with quote marks or plus+signs. For years these all worked well. It's no longer plausible that the reason is to serve semantic search results, they could still include synonyms lower in results while respecting exclusion and phrases but that would make what's really going on too obvious.

The real reason they nerfed their search so bad I often have to use Google with "site:amazon.com" is simply so they can serve up whatever results are most profitable which vaguely semantically match any term. This is a big profit center due to all the 'marketing programs' they push on third-party sellers. Paying for these is virtually required to get on the first page of any popular search. Amazon has a huge inventory of such listings and selling you one of those listing is more profitable for Amazon, but assuming the price is the same, less profitable for the reseller due to giving Amazon even more of their slim margin. Since playing this game has become required, it raises the ASP of all products - another Amazon tax.

Through the Bezos era and up until around ten years ago, Amazon was "good", meaning their broad strategies and policies were generally a net gain for most buyers. Things Like allowing negative reviews and no-questions returns made me a fan and allowed Amazon to destroy all its competition. Since then they've gradually A/B tested their way into, IMHO, pure evil.

For consumers, the only real net gains Amazon still provides is massive inventory and faster delivery for Prime items (although you may have noticed they are now also strategically degrading Prime delivery consistency). Everything else about Amazon is objectively worse. Products are more expensive, search is intentionally broken, the site is rife with paid placements and dark patterns. And no one can compete because as soon as a new upstart offers search that works or lower prices by not forcing all sellers into high-margin programs, Amazon will un-nerf that specific enshittification just enough until the new threat is exterminated.

eBay search is still pretty decent about letting you exclude things and other 'power user' search abilities