Dynamic queue is mostly a success until it starts becoming a train-wreck. The boards are a bad example of the community, although super duper high elo had queue/balance problems. If the underlying problems were fixed, a lot more people wouldn't even care about having a solo queue.
The problem is rito has ignored the subtle problems of:
Above-default-elo to subpar resets making middle of the pack players worse than they should be by forcing them to play out of the low elos. Golds shouldn't really decay into silver ever, its stupid. High elos should definitely have some resets, but its not healthy to have the middle elo in the gutter and have to unfairly play through the sludge just to get back into a marginally equal skill level.
Defaulting accounts to an MMR that is actually below the standard ranked player's skill level aka wood V is silver X.
Not having a gate into ranked, causing a bunch of noobs that believe they are good when they're just winning vs. other new players that probably casually play league out the game.