I think we all agree that the rear suspension may be the problem or at least a large proportion of it. And that the rear part is the main problematic area.
That is why it degrades the rear tires voraciously and this leads to the rest of the problems, worsening the behavior of the car. More or less, right?
The mysterious matter of the wind tunnel, the scale of the models, the necessary software(s) ... and the also mysterious decisions of the FIA regarding TOO MANY things ... we will leave them aside. Although thank you very much for the info.
I don't think Canada, with its curves, walls and demanding braking zones is the best place to do risky experiments. But they have to do something soon because from China we are plummeting and/or the rest of the teams are improving a lot.
It is curious that such small and apparently simple mechanical parts are so decisive...