Thank you for your insightful comment Arkady.
I meant by "language is still a beast" that there's a lot to learn and it can be overwhelming at times, which is frustrating.
I've had a look at your method of subconscious training and it seems like a good supplement to "regular" study. This being said, I think using it alone would mean improving at a slower rate. Many studies have proved the importance of conscious learning, practice, and so on.
The idea of getting rid of translation in our head is, of course, the goal. That's something any fluent speaker of a foreign language becomes able to do. For instance, when I speak English or Japanese, my thoughts are in the language spoken now.
The approach of avoiding translation from the beginning makes me think of Rosetta Stone, which is another good tool as a supplement but probably not on its own because it ignores all the tools we've developed as we grew up.
We're all only humans so feeling frustration is normal. I see a risk in telling people they "will never feel frustration" but the moment they will feel some (which I believe they will), they will blame themselves and may give up instead of finding a solution.
If this method has worked for you, I would be interested in hearing more about its availability to try for other languages than English. It would be an interesting experiment for me.