Fulham reached the 40-point mark four weeks ago, but have now lost their last five games, while Liverpool stretched their unbeaten run to seven matches thanks to Daniel Sturridge's hat-trick at Craven Cottage.
Given his recent employment with Fulham's rivals Chelsea, the Cottagers fans aimed abuse at the England striker throughout the match, but he responded in style, first equalising Dimitar Berbatov's opener with a brilliant finish from Andre Wisdom's long pass.
He then put Liverpool 2-1 up with an opportunistic finish before rounding off the win with a clever chip over Mark Schwarzer after he latched on to Philippe Coutinho's pass.
Jol believes his side should have been awarded a spot kick in the second half when Bryan Ruiz's shot struck Lucas' hand in the Liverpool box.
"It should have been a penalty," the Dutchman said.
"(The game) was frustrating. Normally if we score we win games. We never seem to win games after being down."
Although the west London club are safe, Jol admits things are not looking good for his squad regarding next season.
"If you lose seven or eight players of course you need five or six (to come in)," he said.
"Hopefully you get players in who could be good and strengthen us. If not you have a problem."