There clearly is a power imbalance between the two, but while Elsa acknowledges that Naomi helped her, made introductions, and gave her credibility, she’s more nebulous about what Naomi did to harm her. “Things weren’t going well” isn’t even a clear suggestion - much less proof - of what Naomi did to her, if she blackballed her. Even her comment about Edward is so (deliberately) vague it’s only possible to speculate.
Her “exposing” Naomi in such a non-specific way (conveniently, as Naomi is recently under scrutiny once again) just feels like clout-chasing to me.