Why did people in the western and southern parts of the United States object to Clay's American System?

Southerners opposed Clay's American Systems because the south already had rivers to transport goods and they did not want to pay for roads and canals that brought them no benefit. Since Southerners had to pay tariff, they wanted to make sure that when the tariff was used, they profit from it as well.

i honesty don't know, good luck tho dawg