Why did the peloponnesian league members resent Athens?

Members of the Peloponnesian League resented Athens primarily due to its growing power and influence in the region, particularly following its leadership in the Delian League and the subsequent shift towards Athenian Imperialism. Athens' aggressive expansionist policies, heavy taxation, and naval dominance threatened the autonomy and interests of other city-states. Additionally, the perception of Athenian arrogance and cultural superiority fueled animosity, as many league members felt overshadowed and marginalized by Athenian policies and practices. This resentment ultimately contributed to the outbreak of the Peloponnesian War.