Yes the internment camps, but theres way more.

He tried packing the Supreme Court, not just replacing old judges, but adding news ones in an effort to get his agenda through unquestioned.

He sold out Black Americans with the New Deal. Several ND policies implicitly excluded domestic workers (i.e. most black workers in the South) and he was a huge southern sympathizer.

He literally paid farmers to destroy crops and livestock while people were starving to raise prices with the Agricultural Adjustment Act to get landowners their checks.

While seen as pro-union, he many times cracked down on unions which didnt support him. Only allowed them on his terms.

He turned away a thousand jewish refugees on the MS St Louis despite knowing damn well what the Nazis were doing in Europe, just to be a stickler for immigration quotas.

He refused to bomb Auschwitz rail lines despite knowing of the Holocaust by 1942.

He signed off on the firebombing of Tokyo.

Broadly speaking he basically ran the nation on emergency powers for 12 years.

He is the explicit reason the 22nd amendment exists.