Shanna Moakler ain't sparing any of her exes ... blasting Oscar De La Hoya over how their relationship ended.
The former Miss USA claims she was blindsided after watching Oscar on TV attending the Latin Grammy Awards in L.A. with his now ex-wife Millie ... telling Bunnie XO's on her 'Dumb Blonde' Podcast he told her he was going to NYC for a work trip at the time.
She says a lawyer came to her Bel-Air mansion the next day ... ordering her to move out with their baby daughter, Atiana immediately.
Shanna adds Oscar told her he wasn't happy she sued him for child support when they met up IRL a month later ... warning if she sued him for palimony, he wouldn't see her or the baby until she was 16 cause he had more money than God.
Oscar was true to his word ... Shanna says he didn't see his daughter until she was around 16.
They dated for 3 years from 1997 -- even getting engaged in the process.
Meanwhile, Shanna dropped a further slew of relationship bombshells during the podcast.
She claimed that her ex, Travis Barker, was trolling her online when they were together and also slammed his new wife, Kourtney Kardashian's family ... again.
We've reached out to reps for Oscar ... so far no word back.