This action alone should make FDR go down as one of the worst presidents in US history, yet many people still consider this monster great.
There are some actions that cannot be washed away no matter how many other good deeds you may have done.
[1] "The American public overwhelmingly approved of the Japanese-American internment measures and as a result, they were seldom opposed" https://en.wikipedia.org/wiki/Internment_of_Japanese_America...
While literally every other nations in the world had many years ago started to grow again.
FDR policy like the NRA were some of the most horrible and nonsensical invasion of the US economy ever attempted and were overwhelmingly counter productive.
What saved him early on was to get of the gold standard and that policy was already in planning from Hoover. After the US went of the gold standard the fast 3 month recovery in the history of the US happened (faster then even the 1921 recovery) but the from the moment the NRA was established growth was essentially halted.
He then made a massive about turn before WW2. He kicked most the idiot communist and fascist sympathizers from his service and hired people who actually knew what they were talking about economically speaking. He embraced business where before he was hostile.
And thankfully he did before he could return back to his pre-war policies leading to the economic miracles in the 50/60s.
That said, I think he made a number of very bad mistakes during the war. The internment of Japanese Americans being one of them.
The other being the unconditional totally over the top support for the Soviet Union. While help for to prevent Soviet collapse specially in 1941 maybe 1943 was warranted, the amount of power Soviet agents had in the US to command the US economy was frankly insane. And for that gigantic amount of effort almost no political concessions were asked for.
During the whole war in fact, did the Soviets hold captive Americans. Like literally in prison camps where many of them died. Not even did the US asked them to be freed.
Almost every possible military and industrial secret was opened up to the Soviets. The Soviets were not only able to order the most advanced chemicals like lubricants, explosives, but also whole production facilities and the tools to set them up.
The dominate position of the Soviets Post-WW2 is in not insignificant parts because of FDR unconditional support for them.
Even Churchill who had turned incredibly pro Soviet at times thought FDR was going to far to please Stalin. And Stalin didn't appreciate it at all and responded to every sign of good will with even more absurd demands. Its fair to say that Stalin played FDR like fiddle.