The 70s and 80s were certainly a dark time for cartoons. Mostly because executives thought kids would want to sit through crap like this:
While not based on a TV show, this one is included because it was riding on Coleman's popularity on Different Strokes. And because it's fucking awful.
Edit: According to TVtropes, this was based off of Coleman's made for TV movie,The Kid with the Broken Halo. Knowing this does not make the fact that the cartoon exists make any more sense.
Before we get into the 70s, lets look at another one from the 80s when this awful trend was starting to die off:
Do you remember Punky Brewster? Nope, neither do I. I wonder if she had a magical cat in the live action show too?
How the Hell would you come up with something like this? Why would you waste time and money and animator's wrists making it? What lame kid was watching? Well that goes for most of these shows. At least it's not as bad as...
Poor Wolfman Jack. I wonder how much he got paid to do the theme "song." At one point he sounds flabbergasted for a second, like he had to pause and go "what in the name of Elvis's back hair am I reading?"
Oh and if that's not enough, they combined both shows with a third!
Can you imagine going to school and admitting to your friends that you watched The Mork and Mindy, Laverne and Shirley, and the Fonz Hour? I'm pretty sure what few friends you had would start keeping their distance pretty quickly.
Oh and did you know that there were two Gilligan's Island cartoons? In the first one they were back on the island again somehow:
What I want to know is why they got rid of the catchy theme song? The new one sucks as much as I'm sure the cartoon did. It must not have done very well because they made another one....IN SPACE!:
And they re-worked the opening theme from the earlier cartoon. Great. Too bad that planet they landed on had a breathable atmosphere...
Wait, are you done vomiting yet? Get ready to run for the toilet again!:
Hooh-rah, wasn't that fun? Oh wait, I'm not even done yet!
Again, why did they get rid of the original theme song and replace it with crap? Or better yet, why was the show made in the first place? Dukes of Hazard was cartoony enough on it's own!
Oh Hanna Barbara, why why why why why?
Again: awful idea, awful animation, terrible theme song. WHO WAS WATCHING THIS CRAP?
Alright, I feel a bit sick and I'll bet you do to so I'll just...
PARTRIDGE FAMILY CARTOON!
IN SPACE! Well, in the future anyways. Way to horribly rip-off the Jetsons though.
Alright, I'll leave you with this song from the animated spin-off of Be-witched oddly titled, Tabitha, Adam, and the Clown Family.
Edit: Try muting this last clip and playing Closer by NIN over it. I dare you!
Happy nightmares cartoon fans!