But they were also completely addictive, from Wonder Woman's not-so-invisible jet to Aquaman's often-not-very-useful superpower of talking to fish to the odd and somewhat racist token heroes added later on (Black Vulcan! Apache Chief! SAMURAI!)
I think as kids we were supposed to identify with the kid characters, WonderTwins Zan and Jayna (and Gleek) or Wendy and Marvin (and Wonderdog). But no one ever did -- they were just handy hate fodder. My real fandom was reserved for the Legion of Doom. Seriously, how cool were they? Their head-shaped headquarters rose out of a swamp and could fly if needed. The villains themselves were all flavors of messed up, including the barely English speaking Solomon Grundy, a swamp ZOMBIE, and Gorilla Grodd, a superbrainac gorilla. Just read some of the descriptions on the Wikipedia entry: "Toyman: Dresses as a jester; uses toy-based tactics to commit crimes."
There are some great YouTube clips from SuperFriends, and the comments with them are just as hilarious as the show itself. One person wrote: "It's like every minute of this show was written by a separate group of people who never speak to each other."