It depends, best for what?
Generally, I'd say Linux Mint is the best distro since it's general purpose and easy-to-use.
But for gaming on bleeding-edge hardware where you need latest graphics drivers or a kernel update with better game performance, the best ones are Arch Linux and EndeavourOS.
Or maybe you've got the opposite situation, you have a really old device. The best one would be something lightweight, although I'm not aware of any Linux distros that specifically fill that requirement.
For servers, Debian is a good choice, and in my (not-at-all-experienced with servers) opinion, it's one of the best distros for a server since it is pretty stable.
And, for developers, I think the best one would be NixOS since, from what I've heard, it's great with package management and is also immutable, meaning you should have less issues with having multiple versions of packages.
as for the worst one, it's ubuntu because i hate it and canonical is the devil ^/s^