- "Local" board admins/moderators run fiefdoms and act in capricious ways.
- The downvote is too powerful, too easy to abuse, and its overuse leads to echo chambers. Unpopular opinions don't need to be talked about or even seen, just hit that button, lol.
- Accounts are weirdly pseudonymous but retain a running post history and gain strength over time. Throwaway accounts are apparently encouraged but are usually penalized in a way that isn't obvious or transparent to the user. There's therefore a thriving market in "high karma" and old Reddit accounts, which are bought and sold in large numbers for small dollar amounts. This is widely abused by the marketing and astroturfing crowd.
- You can also buy upvotes and, crucially, downvotes. This, too, is widely abused.
...And I could go on all day. It's not only a bad site, it's a poorly-conceived site and a future competitor should not copy its mistakes.