that is odd. a lot of people i know add carrots to sweeten the sauce, so as not to have to add sugar.
i did that once, tried adding a little bit of sugar from a bag, and a big chunk dropped into the pot.
the only way i was able to reduce the sweetness, as was heretofore mentioned, was to add a lot more tomatoes, wine, and salt, and oregano.
A true lover of nature does not despair now that his mistress has turned a colder cheek.