I mean, based on reading through the "I've read this on Wikipedia" backstory to the Defiant and to the series as a whole approach the article takes then I am dubious as to the quality of the sourcing and how much of a pinch of salt to take with itThat's not the way Ira Steven Behr saw it, and not the way the original script of the fim had it.
https://screenrant.com/star-trek-ds9-defiant-failed-fighting-borg/#:~:text=In the original script for,to blow up DS9's starship.