The Cottagers went into the game on the back of a 2-1 home win over Newcastle last Monday but two goals from Adel Taarabt put QPR in the driving seat before a deflected Mladen Petric strike ensured a tense finish.
Jol said: "I'm very disappointed with our style of play - I can complain about the goals but especially first half we never looked to earn the right to use our quality.
"We looked a bit rigid. On Monday we had players in midfield, like they had Adel, they need to travel and do something extra.
"We didn't do the simple things or play in the flow. I wanted to give 10 of the 11 players who played last week the chance to do it again but there were too many players not there."
The Dutchman also felt the defending from his side could have been better for both of Taarabt's goals.
He added: "The second goal for example was very cheap and easy and the second was a deflection.
"We tried to get in their half and the passing was sloppy and they could break us away from home. Our two central midfield players could never get up the pitch and support."