You want to make the accusation that the business failures of someone who has had legitimate successes on the scale of Elon Musk are con jobs then the burden of proof is on you. And I don't see an proof. Not from you, and not from anyone else who says it.
Hyperloop is very much a con job. "Full Self Driving is just a year away" is very much a con job. The cybertruck is a con job. The Tesla Semi is a con job. The tesla robot is a con job.
The thing is that they are not just honest failures, they are outright lies.