It's also easier to lie about what the current government has done wrong, there are no laws against it.
You can just lie at a velocity never seen before on this planet, spread falsehoods via social media, breed outrage, spread conspiracies and then elected.
"The bitterness and rivalries seen in the partisan 1796 campaign got worse in the 1800 rematch between Adams and Jefferson. At one point in that race, Jefferson’s supporter, notorious pamphleteer James Calendar, claimed that Adams was a hermaphrodite, while Adams’ people said Jefferson would openly promote prostitution, incest, and adultery..."
It's a matter of how widely something is disseminated and how strongly it's reinforced. The question isn't what's the grossest propaganda you can find in the history of political campaigning, the question is what's the grossest propaganda you can find that gained wide acceptance.