As a result of FDR's Lend-Lease, we supplied our allies with what it took to win WWII, with our suffering way fewer casualties than our allies did, and we became the wealthiest nation in the world with everyone else being in debt to us. FDR deserves the credit for that.
The differences of opinion is what makes these polls so much fun.
As far as battlefield casualties go, there are still widely differing estimates of casulaties. At this site; WW2 casualties, the data shows only the USSR, China and Yugoslavia having more battlefield casualties among the allied powers than the US did.
Although given what happened after the war its a strange group of allies. Losing China to the communists is not exactly a great coup either.
It sounds like you're saying that FDR is great because he gave all our money away. He could've done that in 1933 and saved everyone a lot of trouble.