You're contradicting yourself huge; perhaps you should take a look and see that post is even more useless in the sense that you're straight bashing someone else and not applying even a hint of something that could be remotely useful to new people.
For the record, being at the top of the OU ladder doesn't mean in any way that one is the best battler here, especially when ~60% of this community (probably more) doesn't take laddering seriously. The best thing you can do here is to experiment with everything, in tournaments, friendly battles and laddering if you're feeling it. The difference in metagames between here and other Pokemon places like Smogon are actually minute with the new generation, but enough to allow unforeseen strategies to have a surprising impact. I can't say I've delved into it all, and truth is, no one knows all the strategies and tricks to competitive battling; there's thousands of different ways to go in each tier (my Pikachu in Ubers last gen, fluky as it may be, is such an example).
Long story short, if you really want to be a solid battler, do your own thing and only take advice if you truly deem it necessary. Trial and error will help you find your own jive and allow you to draw up a strategy which allows you to not only succeed but to have fun with it as well.