Yes! Amazon's search has been driving me crazy but it went from bad (loose interpretation of what I typed with a whole bunch of irrelevant stuff) to worse (adding more sponsored results, i.e. even less what I want).
Their recommendation engine for related prducts used to be nice but that's been replaced by sponsored products which lowers the quality.
Now, the only way I use Amazon's search is when I have a SKU or part number and type it in directly. But I also do that in Google and often find the same thing elsewhere at similar or less cost (including shipping, though to be fair it may take a day or 2 longer).
eBay's search is still one of the best for me, in that it respects the keywords I put in and allows for extended query syntax to really hunt something down (which then can be turned into a saved search).
One of the most creative things I found on eBay was tool rental. I needed a tool to replace the bearings on my washing machine, and a seller was selling one explicitely as a rental: tool was charged about $120, with $35 shipping. When done, sent it back for a refund. The "shipping" included the rental fee and shipping both ways.