The Queens Park Rangers midfielder had to settle for a spot on the bench under Bert van Marwijk after a strong season in the Championship.
His omission means the 25-year-old is yet to play at a World Cup despite being picked in squads for successive tournaments.
Confident he was going to get to shine for the Socceroos in Russia, Luongo revealed the pain of being denied his chance.
"To be honest it was a really disappointing experience for me," Luongo told Football.London.
“It was the whole thing; I was expecting to play and to make an impact and through no fault of my own it didn’t happen.
"I did what I could to help out the team but I wanted to play and it didn’t happen and I was really disappointed.
“When the team is winning and you’re not playing it’s all good because there’s nothing more you can do but when the team’s not playing well and you’re sitting on the bench and emotions get involved and I feel I can possibly add something different, it’s quite frustrating.
“The good thing is that I did everything I can to make myself fit for games and offer myself to start and it didn’t happen.
"I’m not blaming myself for it – I put myself in a good position and next time, with a bit of luck, I’ll be picked to play.”
Losing out to Aaron Mooy, Mile Jedinak and Tom Rogic for a start in Australia's midfield in Russia, Luongo is hopeful the 2022 World Cup in Qatar will see him finally claim some minutes at the tournament.
With new coach Graham Arnold set for a long stay in charge, the midfielder is hoping he can leave an invaluable impression.
"In four years a lot of the older players won’t be involved so at the moment I’m hopefully in the best position to play if we qualify," Luongo said.
"For this one, I think it’s just a case of balancing it with the boys – how well they were playing and what was needed for the game.
“Probably not knowing about his players as much as our previous manager did won’t have helped, but for the next one we’ve already announced our new manager so he’ll have four years to look at me and see how it goes and hopefully then I’ll have some idea as to whether I’ll be playing or not.
“I kind of just want to put it away and use it as motivation for the season.”
Luongo has returned for pre-season duties with QPR and is adjusting to life under new manager Steve McClaren.
While tipped to move on from the club after such a strong showing last season, Luongo seems content to remain at Loftus Road and revealed there has been no transfer interest shown in him.
“There hasn’t been anything in terms of interest," he said.
"I don’t think the club are expecting me to go; I’m not expecting to go either so I’m just training and there’s literally no talk of anything and I’m just getting on with things as normal.
“Of course anything can happen in football today, or the next day so you never know.”