Why was general McClellan considered to be sn ineffective leader?

General George B. McClellan was often deemed an ineffective leader due to his hesitance to engage decisively in battle, which led to missed opportunities during the Civil War. His overly cautious approach, particularly during key campaigns like the Peninsula Campaign, caused frustration among his troops and political leaders, including President Lincoln. Additionally, McClellan's failure to capitalize on advantages and his tendency to overestimate enemy strength contributed to perceptions of indecisiveness and lack of aggression. These factors ultimately resulted in his removal from command.