They’re not terrible. I grew up with them, and have a hearty amount of nostalgia for each one. I recognise the numerous flaws, but I still enjoy watching them. Sometimes (briefly) I’ll watch one and try to convince myself that they are good, as I thought all throughout my childhood (actually, up until mid 2015)

For what it’s worth, I rate them like this:

The Phantom Menace - 5/10
Attack of the Clones - 4/10
Revenge of the Sith - 4/10

I prefer them all to The Clone Wars (2008 movie).