McLaren boss laments 'incredibly frustrating' double China failure
World champion Lando Norris and Oscar Piastri were left kicking their heels in the pit lane because of issues before the start at the Shanghai International Circuit.
It compounded an awful start to the season for constructors' world champions McLaren.
"We came here to go racing and today we were not in condition to do so because of technical problems," Stella told Sky F1.
"This is very frustrating and disappointing for the team, for the drivers, for our technical and commercial partners, and obviously for our fans.