The worst i have used was fedora lxqt. A really disappointing experience. Not entirely unusable, but a big downgrade, even compared to things like Antix. It is incredibly slow, looks ugly, has like 1000 packages at most, that doesn't contain more than the most basic and well known software. When i try to install anything else than dnf as package manager, it will not work, or just break. For someone who wants Linux for experimenting, it is highly advised against