[lasagnaphil]

At least with Reddit, you get to choose your own echo-chamber by subscribing to subreddits. For some other sites such as Facebook and Twitter, you aren't even sure what echo-chamber the all-mighty "algorithm" is guiding you.

I think the best way to enjoy Reddit is to first unsubscribe to all the default ones (I did this with the exception of /r/Art), and then pick really niche subreddits that you want to be a part of, not the general big ones that usually has the shortcomings that you've mentioned.