

FOSS isn’t always more secure than closed-source, but it absolutely can be.
It depends on the priorities of the maintainers. It seems like Jellyfin’s maintainers might not be putting a huge emphasis on security, which is very disappointing, but they are volunteers at the end of the day.
I think I tried DamnSmallLinux in a VM around like 2008 or something which I thought was really cool, then I tried Fedora which I didn’t really like, then I tried Ubuntu which I really liked and still do, although I’m going to switch to Mint at some point because I prefer the idea of having a community-owned distro.