Fed up? If you are a progressive with a mindset against two party entrenchment's prosperity, you should be fed up.
Headline from here. Atlantic, here.
It's enough to make one vote for Trump. Almost enough. That'd be hardcore disappointment/disillusionment.
Too old for disillusionment, disapponment previals here. The Crabgrass prospered, and choked off sanity.
Moving on . . .