Reading won the match 3-1, after coming from a behind.
Jol said: “At half-time we wanted to put it right but you need personality and character.
“It’s frustrating, you get a bit angry as well because you can do all the hard work and prepare yourself well.
“All credit to them because, apart from Arsenal, not many teams have won here but if you make those sort of mistakes you can’t win any game.”
