Yes, he was an arrogant and disrespectful commanding officer. Lincoln tolerated him far too long in my estimation. I’ve often wondered if Scott McClellan was related to Little Mac. If so, stabbing their boss in the back must be in the genes.
He once made Lincoln wait in his parlor for an hour then sent his wife down to tell Lincoln he had gone to bed and couldn’t see him. An officer who does that to his commander should be sacked immediately. Lincoln’s cabinet urged him to fire McClellan for that insult. Lincoln put the country ahead of his own pride and did nothing, believing Mac was the only officer he had to lead the troops.