Anyone who says winning should be a breeze is an absolute idiot. You're dealing with a cult and an electoral college that skews the race toward the Republicans. She'll win the popular vote, but that's all that's certain.
Honestly, it should be easy if you embrace economic populist policies, but instead Harris is running to the neocons and trying to triangulate to present herself as a principled Republican.
It literally doesn't matter. She's still going to lose all the red states. She's not swaying any Trump voters with that message, they've already decided, for the most part, to vote against their own interest.