Not a whole lot of experience distro-hopping here (went from Ubuntu to Endeavour and haven’t really changed since) but from what I know it seems like most distros have their place. Arch is highly customisable and all rolling release distros are good for gamers and those who need the latest software. Debian, Ubuntu, Mint, and other LTS distros are good for servers and newcomers (fewer big updates and therefore fewer potential crises)
For the sake of answering the question, I’d say Ubuntu is my least favourite. Its pretty bloated, and then there’s the whole snap fiasco