I've been having a similar flashes of "Wait, what if Kamala is the most progressive candidate possible and America has always been this shitty and indifferent to atrocity."
But I think there's genuinely a sense that the decay has been getting harder to ignore and it's making the people who don't want to see the cracks (most of them) go a little crazy. Everyone's hyperfocused on villains. Convinced that all we have to do is beat Putin in Ukraine and defeat Trump in the election and then things can finally go back to normal and the grinding decadence will stop.
There's a stench of desperation wafting off the enthusiasm for Harris and the repetition of "this is the most important election of our lifetimes" to the extent that it has become a meme isn't so much a statement of stakes as it is a prayer, an optimistic statement that what's left of the middle class will be able to retreat back to comfortable complacency after ensuring the reins go back into the hands of a competent technocrat who will fix things.
It has led to a willful and dangerous blindness and I feel some anxiety for when the time comes that it no longer becomes tenable to maintain.