That's a good round-up. There's also just a longevity effect. With even the best mod, failures can get magnified and successes hidden. The best wank is headed off at the pass and handled quietly - which means mods don't get credit for it. If someone goes to the mods privately and their problem is solved, they're not likely to come to anon memes to bear witness to this. They're just going to go about their day. However, if someone goes to the mods and they don't like how the mods handle the issue, they often complain about in places like here. For that to happen, it doesn't matter if the person with the problem was stirring shit and the mods were right not to give them the time of day, or if the person with the problem had a legitimate issue and the mods were rude as fuck towards them. Either way, the person will be unhappy and will frame things according to their dissatisfaction.