I like how the "counters" argument went from "Garchomp has no counters!" to "Garchomp's counters can all be worn down easily!" when the former was proven wrong. Unfortunately, quite a few pokémon can fall into the second category. :/ Oops?
This is the paragraph that makes it absolutely clear that you do not understand the issue actual players have with Garchomp. It is fine for you to sit on the sideline and make judgment calls, but rubbish like this illustrates why you should not be posting on an issue you do not fully "get".
The argument has not changed, you are simply misunderstanding/misrepresenting it. It is not "Garchomp's counters can all be worn down easily!", it is "Garchomp's counters can all be worn down easily... by Garchomp!", and that's a massive difference. The things you'd expect to beat Garchomp - that is, the few things that can switch in and survive a +2 Outrage or Earthquake - are all outspeed and promptly 2HKO'd by those attacks. Which means they've all got one turn to kill Garchomp, something
none of them can do thanks to Yache Berry (and the fact that such defensive Pokemon tend to have lower offensive stats).
Which means the only true "counter" to Garchomp is not a single Pokemon, but a two-Pokemon combination: One to weaken him, one to finish him off. And no matter what you do, you lose one of them. If you actually played the game, perhaps you'd understand the sort of impact that has on things, but the more you post, the more painfully obvious it becomes that you're out of touch with the D/P metagame.