That's because you're a power user.
Reddit owners figured out that even though the service gained popularity as a middle ground between 4chan and Facebook, they can make most money if they kick out weirdos and cater to general audience, so they're consistently making changes to make it appealing to average Joe. You can clearly notice how they're slowly but surely removing controversial content and promoting userbase growth over everything else.
My prediction is that Reddit will keep growing, but it's simply going to be "Facebook, but for people 15 years younger".