Inza was Kent Nelson's wife. Kent's the guy who played Doctor Fate, until they replaced him with other characters in the 90's, like Hector Hall (Hawkman's kid).
So Inza was basically the first replacement, filling in for her husband Kent.
And she didn't have the help Kent did, because Nabu, who used to live in the helmet as Kent's personal "Obi Wan Kenobi", wasn't living in the helmet anymore. Instead, he was reincarnated as an old man, and enjoying all the things humans took for granted like emotions, sleeping in, eating too many nachos, and being a generally funny retiree.
So Inza became Fate in place of her husband, and on her first day she gets in a fight with a Lord of Order trying to put her in her place, and beats him down.
She does the same thing to other Lords of Order/Chaos.
She also decides to use her magic to fix things, like remaking entire run down slums, making street lights work, fixing people's problems. Picture Aladdin's genie. That's what she decides to do with her time, only for the entire world instead of just one person.
It's actually a really good story.
But the main point is, a total nobody with nothing but the helmet she got from her husband became a major force against god like beings. I think it goes without saying, Wrecker would lose pretty badly to Kent Nelson, Hector Hall, Nabu, or whoever is Fate currently.