"I had six or seven singles just tank," the Australian Idol winner told the Herald Sun on Thursday.
WATCH: Guy Sebastian breaks down on The Voice
The pop singer opened up to the publication about how his dreams for certain singles never came to fruition.
"Literally no (radio programmers) added one song that I thought would be a smash. When that happens, you start to believe you're a failure," Guy admitted.
The 37-year-old claimed that he had to change his approach to producing music and learned to place less emphasis on commercial success.
Through focusing on having a strong artistic message, Guy was able to develop a thicker skin.
"The resilience comes when you remember the reason you do this is not for the charts, it's for the things I believe in, and wanting people to be affected by my art."
The reality TV judge was able to impart this learned wisdom to his contestants, stating that they should be "realistic" about what to expect from the music industry after the show ends.
The Aussie idol reiterated that he is living proof that winning a reality show contest didn't necessarily guarantee stardom.
The husband of Jules Sebastian originally studied a degree in medical radiation while exploring music on the side before his stint on Australian Idol.
It seems that Guy isn't having the best week, with his entire team eliminated from the Voice.
Jack Vidgen performed a moving rendition of a Calum Scott's You Are The Reason, while The Voice audience enjoyed Mitch Paulsen's reggae version of Post Malone's Better Now.
Chynna Taylor blew the audience away with crowd-favourite Jolene by Dolly Parton.
Sadly, Guy's team members will not continue to the grand final.