"Keep up and one day you'll be canon too."

Saiyans die and their bodies stay in the real world, but ramekins are so wild that they die and go straight to the after life. Unless you're piccolo and at best you get a temporary body in the afterlife when you go to hell or whatever.

That is weird, right? Why not have a fan manga that tries to explain why some of these characters keep their bodies when they shouldn't. I mean Frieza makes sense because he's a demonic race from the mortal realm, but what about everyone else? Cell(could be explained by being a member of Frieza's race), any human, really just filler characters and whatever was happening between the saiyan saga and namek saga.

Realistically Broly could never destroy the entire universe.

He does not have instant transmission or any other tool to quickly travel accross the universe

He does not know the location planet Namek.

What Goku should have done is first teleport Dende and piccolo to Namek and then the rest of his family which leaver with two pairs of dragonballs to be used.

Then revive those that have died and come up with a strategy to defeat or at the very least contain Broly.

As powerful as Broly is he has no means of travelling the galaxy quickly and can't destroy of find every planet within his lifetime.