The term limit wasn't formal then, and as he was elected, it's clear he was wanted for the job, it's not like the threw out the ballot box like some other "Presidents/Chancellors" in the 1930s.
His policies didn't do much then, but his attitude helped the country greatly, and his policies DID help us immensely later on; public works projects, new agencies, social security...
And then there was that little matter of business he attended to from 1941-1945...
A GREAT president.
(What's odd for me is that you don't like him, but even more so that you dislike him SO MUCH...usually it's the far-right that hates FDR and often JFK as well, and I was under the impression England's political stance was a bit more in line with the American Center-Left, not quote liberal but certainly not conservative...and anyway, why would England CARE so much about a president, even FDR; granted he and Churchill had a little matter of business in Europe to attend to, but still, why do you as an Englishman despise an American President who sided with your nation so much?)