I would say that there is an issue with the boards.(can we make this place better?)
The vast majority of posts that are made are low effort incredibly low quality. Many of the ones that reach the top of Hot are low quality "upvote if you agree" or complaint posts with >100 characters. It's sad really. Posts like "upvote if you hate yasuo" reach 140 and get seen by hundreds but high quality drawings, good champion designs, thoughtful balance posts, help/assistance guides, and many more all get stuck at less than 30 upvotes and few people notice them.
It's kind of a problem, since good artists, thoughtful people, and helpful ideas get stuck where they are rarely seen. We can easily improve though.
The issue with high quality posts is that they take more effort to interpret and read that 75 letters detailing how OP caitlin is. If people take the time thought to try and look at quality posts then the site can improve over time.
The best things to do are to make quality posts yourselves (instead of shitposting for the sake of shitposting, even though it's fun), encourage people (just a simple "wow this is a great post" in the comments goes a long way), and upvote/invest in them so that more people can see content that people spent time and effort on.