Is it not case of getting weight on the front wheel to deweight the rear and then slide it around. I am not particularly good but I do ride tight switchbacks like this. This is part of a scandi flick approach. You also need some speed to make this possible and the amount of speed can seem too much.
Was the corner bermed? Just rail it if so. I ride loose stuff on XC tyres so it's s lot harder to commit than I make it sound. And I've scars on my forearms from lowsides.