Overall I thought Season 3 was good, and about on par with Season 2, but both pale in comparison to Season 1. I still am a fan of the show and don't let the more annoying ones ruin my experience, but I'm hoping that Season 4 brings us some good stuff.
Glad that the release is actually sooner than I expected. I was joking around with another R&M fan at work yesterday that we'd be seeing Season 4 in 2021.
i was lttp on the show and watched all three seasons back to back earlier this year. while the first season definitely felt the freshest of the bunch, i didn't really note that much of a decline overall. people who waited for the third season seem to have more of a negative reaction to it, and i don't really see why. pickle rick is often mentioned, and yeah, it's was kinda stupid, but it was just one episode.
i also hear about the awful fanbase, but i don't even know where i would encounter them.