Soldato
Well Ric was the 'older' driver, wasn't he? Therefore your logic doesn't stand up.
People's claims are not around feedback they are saying the car is specifically designed around him which I don't believe.
Don’t forget that Ricciardo was the Number 2 driver to Vettel in 2014 and outperformed him despite them both having poor reliability all season. And that was in a car obviously based on (regs change allowing) Vettel’s preferences from his all conquering 2013 car.