Beauregard faced considerable criticism for his decision to evacuate Corinth, Mississippi, in May 1862. Many believed that he had abandoned a strategically important location without a sufficient fight, leading to a temporary suspension of command.

Beauregard had a strained relationship with Confederate President Jefferson Davis. They often disagreed on strategy and tactics, leading to friction and undermining Confederate unity.

Beauregard's association with the Louisiana Lottery drew criticism due to the lottery's reputation for corruption and its exploitation of the poor. This association tarnished his reputation in some circles.