I think the source of the problem is Reddit's upvote-downvote system. With the upvote-downvote system you get content and communities rise to the top based on consensus, which is supposed to be based on the quality of the content but in actual fact is based on whether the most people like it regardless of quality.
Many quantifiable human traits, such as intelligence but also other things, can be placed on a bell curve. The average makes up the biggest chunk of the population. Because what's rising to the top is based on the consensus of LOTS of people, with the MOST upvotes rising to the top, the content that gets featured and promoted on reddit is what the average person likes because average people exist in far greater numbers than exceptional and "exceptional" (teehee) people. With the internet having become popular and flooded with normalfag late adopters quite a while ago, reddit has been swamped with quite literally millions of very average, mediocre people who promote very average, mediocre content because that's what they're up to speed with and enjoy. If you are unlike the average person, you are in all likelihood not going to connect very well with the kind of content put out by a website ruled by the consensus of the most people, because most people cluster around the average of the population. Reddit is mediocre milquetoast faggot central.
Doesn't help that the internet was originally used by smart people who understood how to use computers (which are a lot more complex than other pastimes such as, say, chroming through a hose pipe), so it being flooded with average people will inevitably degrade its quality.
So I guess the question is whether you're significantly smarter than the average person (not sucking your dick but I'd say you are), whether you have very different cultural taste from the average person (because culture right now is a toilet, it would be more than fair to call it dumb), whether you are more educated than the average person (culture is dumbed down to hell and back so it can be sold to the lowest common denominator, so this works quite well too, plus you say you read quite a bit), or whether a combination of/all of these things are true (I would say this is the case).