When I look at FDR, I don’t think about WWII. I think, “There is the first President to openly and unapologetically abandon the Rule of Law of the Constitution, which protects our freedom, and attempt to replace it with his own code of ethics ushering in the Rule of Man, which is tyranny.”
Of course, there were times when Roosevelt didn't bother to get permission from the courts, like when he seized Montgomery Ward.
Roosevelt was a great war leader, but his domestic programs were a disaster. The economy in 1938 was no better than in 1932.