Hello, 9-year redditor here.
Reddit these days has a lot of memes and pictures. That's partly because people can go through them quickly, so they're less likely to forget to upvote and can upvote more things. Once Imgur started providing good free image hosting without view limits, I think Reddit went downhill a bit.
Reddit also has a lot of stories that are debunked in the top comment.
Both of those issues could be mitigated by only allowing people to vote on submissions from the comments page. That way people who upvote a whole page of pictures and people who upvote stories based on the headline without reading comments would have less influence relative to people who prefer longer content and so upvote fewer posts.