Shaq did help the Heat win their first NBA title, but that was it. LeBron helped them reach 4 straight NBA Finals, along with Wade and Bosh.
"I'll say this, and I mean this," Riley told the South Florida Sun Sentinel recently. "Shaq's acquisition was bigger than any acquisition that we ever made, including the Big Three."
Sounds to me like Riley is salty about losing 2/3 of the Big Three while the 3rd may never play again.