75% of the population dissatisfied with the way the country is running and they still voted Democrats.

Bear in mind, that number doesn't tell you what the 'dissatisfied' want. If one assumes 30% of that 75% are extreme leftists (the ones afraid of climate change, white supremacy, and covid), for example, and adds that to the "satisfied" group voting for status quo, you get dangerously close to 50%.