Reaganomics halted a progressively narrowing wage gap and lead us to where we are now.
He fired 11,000 striking union members which made it ok to declare war on unions. The middle class has never recovered.
He ignored the AIDS epidemic and when he wasn't ignoring it, advanced the notion that it was a sinners' disease.
He revoked the Fairness Doctrine which lead to the establishment of Fox News, Rush Limbaugh etc.
He campaigned on the idea that government is bad and doesn't serve the people's interest.
He repealed the Mental Systems Act which lead to the homelessness or incarceration of thousands of the mentally ill.
His administration was statistically the most corrupt ever. 138 members of his team were investigated, indicted or convicted for their roles in various scandals.
He deregulated the Savings & Loan industry which would lead to the subsequest Savings & Loan crisis.
Was basically the initial funder of Al Qaeda when he funded Afghans opposed to Russia because he hated communism that much.
Reagan was an FBI snitch during the McCarthy years.
He created the Office of Public Diplomacy which manipulated media with White Propoganda. Please do your own research on this - terrifying.
His administration used EPA Superfunds to influence elections.
As mentioned, Iran-Contra.
He vetoed sanctions against Apartheid South Africa.
He also said this: "Last night, I tell you, to watch that thing on television as I did," Reagan, then the governor of California, can be heard saying to Nixon during a phone call following China's recognition by the U.N, “To see those — those monkeys from those African countries — damn them, they’re still uncomfortable wearing shoes.” https://www.salon.com/2019/08/01/that-racist-reagan-recording-just-confirmed-what-my-community-already-knew/
etc.
Almost everything wrong in America now can be traced back to the Reagan years.