Maybe you need to listen to *this* (put it on repeat, as I couldn't find a 10 hour version):
Anyway, one problem is that we have absolutely no moderation, which results in particularly nasty posts staying up and being unpunished (and sometimes rewarded; I have seen personal attacks on me get "high rated").
Another is that the up/downvote stuff leads to a form of mob rule, where unpopular or controversial users end up with their posts being "low rated" (sometimes even posts that are both good and non-controversial); in extreme cases, the "report as spam" button is used to result in innocent posts being deleted. Basically, if enough users dislike a post, it gets deleted, even if it is not against the forum rules (which do exist, but are not being enforced, except maybe the rule about posting links to pirated games). In fact, the up/downvote buttons have been abused so much that Rep is no longer a reliable indicator of whether a poster is a good poster or a scammer.
One example of something that happened: Alaric.us posted a script that allows a user to make posts by specific users invisible. That resulted in a huge backlash, which in turn resulted in nearly all their posts being "low rated", and nearly all their topics being deleted. Of course, this user then replied with a script that would keep re-creating one specific topic every time it was deleted, and I believe the create/delete loop went on for over 150 iterations. (I should mention that the original version of the script contained a misfeature; it had a sizable list of users that would be blocked by default.)
Another example: One user (who I will not name here) claimed that Final Fantasy 4 was grindy, and I replied that it wasn't. This led to that user getting angry for no good reason, and eventually hurling transphobic and ableist language at me. The post with the transphobic and ableist language was "low rated", but a (months) later post by that same user that used similar language against me ended up being "high rated". On a forum with minimal moderation, that post would have been deleted and the poster punished (or, at the very least, warned) as a result; on a more heavily moderated forum, a mod would have stepped in before it got to that point.
Then, of course, there are also users who take the "moderation is censorship" argument. While that does have some validity (I don't think any user here wants heavy moderation), it suffers from the fact that certain types of speech (like hate speech and harassment of another user) are not free speech and should be moderated. On the other hand, a simple difference of opinion (particularly if the opinion is critical of the company running the forums) is not something that should be deleted.
Does this help?