You're the one who claimed the market will solve this problem, the onus is on you to provide evidence for your position. Additionally there are plenty of cases out there of objectively terrible CEOs (Elizabeth Holmes comes to mind) that don't get booted out - it usually takes regulators or even the justice department to deal with it in those cases. Which is exactly what's being proposed.
You also are not laying out exhaustive and conclusive evidence that laws are needed for this.
I think your Elon example isn’t good and has more to do with politics than business/economics.