What were the major reasons why the New Deal was controversial?

The New Deal is said to be the most controversial government "programs". Why? I know many programs under the new deal were declared unconstitutional by congress. ( AAA,TVA,NRA,Wagner Act) Why were they declared unconstitutional? America had never before seen government spending like the FDR's before. This scared many and kept capital tight. Please help explain why it was so controversial I need to use solid example.