No defence of Tesla here at all, but if you read any large car forum regularly, you will see that delivery of new cars with significant problems (e.g. paintwork

No defence of Tesla here at all, but if you read any large car forum regularly, you will see that delivery of new cars with significant problems (e.g. paintwork, interior trim, even major mechanical parts) is not unheard-of from many major manufacturers. And major manufacturers have also had engineering issues with whole generations of cars.