Why is the Marquis disappointed by the Monsigneur's grand reception?

In Book the Second, Chapter 7 of A Tale of Two
Cities, the Marquis has evidently fallen from favor in the French court. 
For, at the reception of the Monseigneur, one of the "great lords" in power, who holds a
reception twice a month in his "grand hotel" in Paris, the Marquis has stood apart from
others of the Parisian Court.  Not many have talked with him and the Monseigneur
himself has not greeted him with warmness:"Monseigneur might have been warmer in his
manner."

Angry at the coolness of the other aristocrats'
treatment of him, the Marquis finds it

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rather agreeable...to see the common people
dispersed before his horses, and often barely escaping from being run
down.

In his cruelty, the
Marquis has his carriage driven with "an inhuman abandonment of consideration";
consequently, the tragic incident of the child being run over occurs that is later to be
the cause of the demise of the Marquis himself.