Curate, connect, and discover
As much as I like the angst potential of f!Leo disliking his younger self, I feel like having raised trained Casey for years, Peepaw would be unable to fully hate him because he knows he’s just a kid. Leo in general is just the type of guy to have a soft spot for children I reckon :)
And come on, when Peepaw catches him throwing jokes constantly, he’d know what’s really going on in little Leo’s head.