Matthew Primus described Port Adelaide's 34-point capitulation to Greater Western Sydney as the club's worst loss since joining the AFL, but has vowed to fight on as coach.
Primus, whose position was already under question, is set to face intense speculation about the future after his charges suffered an embarrassing 16.11 (107) to 10.13 (73) defeat at Showground Stadium on Saturday.
The 37-year-old was close to tears when he fronted the press, seemingly stunned by his side's lack of endeavour against the newcomers.
Part of the Power's foundation squad when they joined the AFL in 1997, Primus couldn't recall feeling worse about a performance in 15 years.
"Not right now. There probably was but you live in the moment and what we've just done - we've had bad losses, but this is as bad as it's been in my time at the footy club," he said.
Captain Domenic Cassisi agreed: "Pure disappointment. I guess a bit of embarrassment really.
"It's really shattering. Matty's got our total support ... it essentially comes down to us a playing group and we've got to lift, and quick smart."
Primus reaffirmed his commitment and desire to keep coaching, and wouldn't be drawn on what damage the shock loss might have done to his prospects.
"We'll find out I suppose," he said.
"I feel gutted and pretty emotional about it all right now, but I believe in the group."
The Giants raced to a 44-point buffer in the second quarter before Port fought back and reduced it to just five midway through the third term.
But GWS, with far less mature bodies and more tired legs, finished with seven of the last nine goals.
Primus said it was a step backwards for the club.
"I've said all year we've improved, now that sounds hollow.
"And it makes you feel sick saying that.
"The group have come along in leaps and bounds since last year, but today just wipes all that out."
Former teammate Warren Tredrea was among the louder critics after the game, calling for an entire club review.
"I'll leave that in the board's hands," Primus said.
GWS coach Kevin Sheedy, who celebrated his 1000th game as a player and coach, felt for his counterpart.
"It's never always about the coach I can assure you," Sheedy said.