I don’t like Snap too, but it has some advantages over Flatpak. And unfortunately the most popular distribution still uses Snap. In example it is easier to create Snap packages and Flatpak does not support CLI only applicatoins ( Edit: my bad ) , but Snap does (something like grep in example). Also some may like it more that Snap relies on AppArmor instead using the custom solution of Flatpak.

All in all, its not like black and white which is better. I still wish only one of the formats would exist, because this is not the kind of fragmentation I wish to have. But both exist and the end user should decide which of them to kill.