City billionaire WABC radio owner John Catsimatidis and ex-Gov. David Paterson took turns over the weekend pounding former show-host Curtis Sliwa for “shooting off his mouth’’ and ruining the mayoral race.

Sliwa, the Republican candidate for mayor, only received 7% of the vote in last week’s election — but critics had previously demanded he drop out of the running to try to help centrist Dem Andrew Cuomo beat the eventual winner, radical Democratic Socialist Zohran Mamdani .

“I was very disappointed in Curtis – how he was just shooting off his mouth,” said Catsimatids, the host of 77 WABC’s the “Cats Roundtable,” on Sunday. I have known him for a long time. He’s a good person. But I was disappointed.”

Catsimatidis was among those who tried to persuade Sliwa, his former radio

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