Sorry you had a bad experience. For $5 you’ll often get very basic services, on Fiverr or anyplace else.
I’m not sure what you expect for $5, but that’s the entry point on the site. In most categories that doesn’t mean world class results. If you want excellence, be sure to find the seasoned sellers with a track record of success. Yes you’ll invest more, but the value is there.
Just like going to an open market with 100 vendors selling food. There will be a range, from “just ok” to excellent, but often the best ones will not be the cheapest.
Fiverr has plenty of great sellers at lower prices than other sites, but for some services $50 or $100 will still be cheap, depending on what you are buying.
Most seasoned/professional designers are not going to provide a great logo for $5.
What would they cost in your local market? I have no idea of the going rates in France, but I couldn’t find a local person in my area that would be under $50 or $75, and that would be the starting point for a basic logo.
Shop with care, there are some excellent sellers here. Just don’t assume all $5 sellers are excellent. Few can produce high value for that amount on any site.