Wrong. I've never posted on reddit, but whenever I need to learn more about a topic, I'll often look it up on Reddit and there will always be an expert who has made a thread about that topic. Sherdog is mostly full of degenerates and trolls.
Bolded the keyword. That's reddits problem man. There's only a few smart and insightful posters per thread. The rest are people flocking to whore themselves out for karma by making jokes, puns, or some popular series reference (Game of Thrones mostly).
There's also recycling in /r/mma, like how many times do we need to see Rory doing a staredown, or Nick/Nate Diaz saying something gangsta (read: stupid)?
It's great for news though. And if you know how to use reddit, it's also great for information (hint stay away from the default and popular subreddits, and just subscribe to what interests you).
Overall Reddit, is good. Yes, the bigger and popular boards are left leaning boards that think a gay man's poop should be put on a pedastal and will down vote anyone speaking against the hivemind, but the smaller and more specific boards are great.
Sherdog's forum though > Reddit. Any day, every day. Here we don't downvote people for expressing dissenting opinion or speaking a popular truth, or just being a retarded troll.
Edit: By the way, it seems that Sherdog is already infested with like whores. Like you see a 2017 account, with over 4000 likes, and you have to wonder what sort of stuff he posts. Cause usually it's always a meme, some trolly remark or whatever. Not insightful, doesn't contribute. But whatever, at least we don't censor or downvote, and sometimes a thread is worth the memes.