This isn't 4 layer. This is still 3 layer. 4 layer is double ramp, floor, wall. 6 layer is this but side by side. All are doable with macro. If you want to look like a cheater, you can do 8 layer (only possible with macro or autoclicker, turbobuild can't click that fast).
They only need to destroy ramp, floor, wall to break this. That's why this is 3 layer. Your other post is probably 2 layer (floor,stair,wall).