Once a rising star, the 25-year-old's ranking has plunged after a car-crash 2017 season in which he admitted he was "bored" and not always giving 100 percent.
He missed out on a wildcard to his home Grand Slam from Tennis Australia after failing to front up for the December playoff, forcing him to go through three sudden-death qualifying matches.
He negotiated two but not the third on Sunday, denying him entry to the Open for a 10th straight year. Reports said he could now be heading to take part in a reality TV show.
"You go do what I did. You go make 13-14 million. Good luck guys. Bye bye," he added.
It sparked a fierce backlash on social media, including from ex-players.
Former Grand Slam winner Andy Roddick said he had no sympathy for Tomic.
"Maybe stop for a second and think of the millions you've left on the table," he wrote on Twitter.
When someone criticised Roddick, the American said Tomic's troubles were "self-inflicted".
Fellow former Grand Slam champion Pat Cash said Tomic had led "a privileged life".
"He really has done nothing in his career. That's true, and that's kind of sad in a way."
Tomic has long had a fractious relationship with Australian tennis fans and Tennis Australia. Last year he admitted he had no love for the game, saying it is just a job and he felt "trapped".
Australian Open director Craig Tiley in November offered him "health and wellbeing" support.
The one-time prodigy was variously described online as "arrogant, a spoilt brat and a loser" after his latest outburst, although some appealed for his critics to cut him some slack.
Local reports said Tomic's next move could be to appear on the reality show "I'm a Celebrity ... Get me out of here!" in coming weeks.
A teaser from Australia's Ten Network, which airs the show, yesterday stated a tennis star would be "at break point before they know it" on the program.
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