Heather Mills has failed to stop publication of a divorce judgment highly critical of her as a witness and her financial claims against Sir Paul McCartney.
Mr Justice Bennett said her evidence was "not just inconsistent and inaccurate but also less than candid".
And he ended his ruling with a word of advice for anyone who puts forward "an excessive, indeed exorbitant, claim". They have only themselves to blame if the court awards much less than what they expected, he said.
Former model Miss Mills sought an award of almost £125 million but the judge decided she should leave her marriage to the former Beatle with a total of £24.3 million.
Mr Justice Bennett had released the financial details of his ruling on Monday but gave Miss Mills a chance to appeal his decision to release the full judgment.
Two appeal judges refused her request for permission to appeal and the judgment on her private divorce battle with Sir Paul became public.
The husband's evidence, said the judge, was balanced. "He expressed himself moderately though at times with justifiable irritation, if not anger. He was consistent, accurate and honest."
The judge continued: "But I regret to have to say I cannot say the same about the wife's evidence.
"Having watched and listened to her give evidence... I am driven to the conclusion that much of her evidence, both written and oral, was not just inconsistent and inaccurate but also less than candid. Overall she was a less than impressive witness."
Mr Justice Bennett said Miss Mills, who lost part of her leg in a road accident, was a "strong-willed and determined personality" who had shown great fortitude in overcoming her disability. He added that she was a "kindly person" who is devoted to her charitable causes.