It’s pitched as a open source operation system, yet the snap store is closed source and vendor locked, one of the reasons some of us use Liniux is because we prefer open source (and there are rational justifications for that).
Hate is a strong word, but there is legitimate criticism, I also think the closed source nature of snap led to the fact that it has no volunteers and that eventually caused malware to appear on the snap store multiple time, it never happened on flathub as far as i know.
Today for beginner i think opensuse and linux mint are better.
Regarding debian having old packages , i use nix but it is fairly immature, flathub should also work.