Griffin was upset with the Panthers' first-half defensive efforts as the Storm were able to clear their lines too easily.
"I thought we didn't have the 80 minutes of footy in us that we needed," Griffin said.
"We started very well and in the second half we clawed our way back into the game physically, but over the whole 80 minutes we just weren't strong enough.
"They got out of their end far too easily in the first half with penalties and our lack of defensive pressure.