One problem with Reddit is that every major community experiences something akin to Channel Drift [1]. Like the subreddit you linked to (r/pics), they all become some version of r/politics-lite where the majority political view gets shoved into every possible sub-community, even where it's not relevant.
It makes the default subreddits totally unusable imo. Sometimes I just want to see funny pictures, not be lectured to about why I'm a racist or how my unconscious biases blah blah blah.