In Auranzeb's time because he had extended the kingdom very far towards south and north east that it became difficult for his deputies to control that area.

Shah Jahan
The Mughal Empire, at its peak, was one of the largest empires in the Indian subcontinent. Among the Mughal emperors, Shah Jahan ruled over the largest territorial extent of the empire. However, despite the vast expanse of his empire, Shah Jahan is often considered one of the less successful rulers of the Mughal dynasty.

Reasons for Shah Jahan's lack of success:
- Economic Drain: Shah Jahan's extravagant building projects, most notably the Taj Mahal, drained the empire's resources and led to economic instability.
- Military Campaigns: Shah Jahan's military campaigns, particularly his costly wars against the Persians and the Marathas, further weakened the empire's financial situation.
- Political Instability: Shah Jahan's reign saw increased political infighting among the nobility, leading to a lack of stability within the empire.
- Succession Crisis: The struggle for succession among Shah Jahan's sons, most notably Aurangzeb, further destabilized the empire and eventually led to its decline.
Despite presiding over the largest extent of the Mughal Empire, Shah Jahan's reign was marked by economic hardships, military setbacks, and political turmoil, making him one of the less successful rulers of the dynasty.