You're describing an echo chamber. That satisfaction is what makes it so tempting and popular across social media. Downvoting leaves you with that smug satisfaction without ever needing to engage the views of the other person. Deriving pleasure in your smug self satisfaction while reducing contact with others that you might not agree with? That's a circle jerk, lol.

Civility/orderly is not the way of democracy. It's messy and sloppy because it has to be. Everything it thrown in and over time, the best floats to the top.