Viewers of the Channel Nine dating show took to Twitter following Miller Fuller and Mark O'Dare were eliminated, claiming the network is "rigging the vote for ratings."
Many were left baffled after controversial couple Eden Dally and Erin Barnett were saved, despite their decline in popularity.
"As soon as I heard Eden and Erin's names tonight I turned off my TV. I can't let that negative energy into my life anymore. Thanks Love Island AU for being the most rigged s**t ever," one fan tweeted.
Another wrote, "We aren't stupid...the whole country want Eden and Erin gone...blatantly rigging the vote for ratings....#loveislandau."
Eden And Erin are among four couples remaining in the villa and all hoping to win the $50,000 cash prize.
Other remaining couples include Grant Crapp and Tayla Damir, Shelby Mills and Dom Thomas and Amelia Marni and Josh Moss.