Even if this wasn't completely exaggerated (if there's data, show it) that doesn't make it a slur, and it doesn't mean it had the power to push Hispanics to vote against their own interests. That's at best a comfortable lie, because the truth is more painful to the Democrats (and especially the overpaid consultants whose careers depend on the failed playbook never being thrown out).
The truth is that South Texas has been ruled by Democrats for decades, and those Democrats have completely and utterly failed their constituents. Not because Republican policies would've been better for them (that has never been true) but because the Democrats that South Texas sends to Austin and DC are weak, lazy, and totally out of touch. This is not something you can fix by adopting the "tough guy" anti-woke aesthetic. You can only fix it with politicians who have a spine and a competing vision.