I am always intrigued by how many people I see complaining that Google Search is dreadful, because I don't really have any big problems with it (something similar happens with complaints about YouTube pushing crackpot videos, which to be fair I have come across occasionally but not nearly enough to faze me). Similarly Meta handily winning the poll is unsurprising - and I am the first person who can't stand the company and is glad to never have had Facebook - but coming from a country where WhatsApp is ubiquitous and not using any of their other products my heart isn't quite in it.
In terms of the poll I am not sure how to answer because on the one hand going by revealed preference the "worst" would be Apple as the one whose products and services I use the least, but on the other hand to the extent that they're all predatory companies the "worst" would be Google/Alphabet as the one which has the most impact on my life and the ranking would be flipped.
A good tip for improving Google searches would be to include the word 'Reddit' in your queries, particularly if they are on the matter of product reviews. Which just shows how bad it is.
I am not sure how to interpret this post but if anything I would enjoy a tip on how to make Reddit disappear from my Google search results.