I only recently watched Rick and Morty about three months ago. I watched all four seasons and there were times it was really hilarious but when they started making sex episode after sex episode it started getting really boring. Tons of potential so I'm hoping they move on from just sex with different things episodes... but whatever.
@SOedipus: I kinda see what you mean; some fans are just the absolute worst. However, if you're judging by strictly the shows themselves and not taking fandom into consideration, then it's Rick and Morty, hands down. SpongeBob has seen a steep dive in quality over the years, ran for too long and with the passing of original creator Stephen Hillenberg a few years back, I don't think there's a chance things will improve.
@DEVILinIRON: I have no idea, I don't even know how to find the fanbase. The types of forums and wikis for that aren't even on my radar.
The most outside of the show thing I did is I used to listen to Grandma's Virginity podcast which has some of the people involved in the show, it's funny, but I didn't ever see their forums or anything either.
All I know is people talk badly about the fanbase, so I'm happy to continue being oblivious to all that.