He basically MADE HER CAREER ... but Elisabetta Canalis feels no obligation to root for her ex-boyfriend George Clooney ... telling TMZ she was hoping he LOST at the Academy Awards.
Elisabetta was out partying in L.A. Saturday night -- when she dropped the truth bomb, revealing that she wasn't pulling for Clooney's "Argo" to win the Oscar for Best Picture.
Instead, Elisabetta -- who dated Clooney for 2 years -- told us, "Tarantino ... I LOVE TARANTINO!"
Back when they split up in 2011, George and Elisabetta released a joint statement saying the split was "very difficult and very personal."
Seems Elisabetta has a taste for sour grapes.