So
@hoschilo trick did help with "not feeling the metal bar" but now I can feel the sticks.
I spent 2 hours yesterday trying different sizes and material of sticks and unfortunately, I can feel them all
Today I decided enough is enough and brought the car to an Auto Upholstering professional.
After reviewing the seat he was amazed how little of spring on the bottom they put (see images below), the number of springs is not enough to support my weight, that is why my bottom falls down and I start to feel the support metal bar.
View attachment 340058
He said it's a pretty simple thing to fix by adding more springs and a bit more foam that would cost me around $150-200.
But last time, I spoke with Tesla about my seat issue, they said that there is nothing more they can do, and they WILL NOT take the car back, nor they WILL NOT approve any custom upholstering work on a seat.
What are your thoughts on that? What can I do?