Kamala offered good economic populist policies,

She kind of did, kind of didn't. A trend that could be observed during her campaign (I saw this quantified somewhere but for the life of me can't find it again) was that while she started with economic populism, as the campaign progressed she watered down, took back or outright ignored her early promises and tried to fill the gap with "orange man bad". This wasn't a coincidence; corporate representatives would systematically ask for "clarifications" and "explanations" about her policies and have her walk them back one by one into something acceptable to them. So anyway, the result of this was that the Kamala of election day was not running on an economic populist platform.