Indigo Airlines — manhandling at delhi airport

I am extremely appalled by seeing that incident where Indigo ground staff were man handling the passenger so badly at Delhi Airport.
Even I have extreme experienced rude behavior by several ground staff at several occasions & I have maintained my calm at all times.
In my view, Indigo staff needs proper training to deal with passengers.
It gives me a feeling that as Indigo's business is rising sharply, the management & staff are flying high and giving a damn to the passengers.
If the passengers decide not to fly with Indigo in the country then the business will be doomed.
Even I am frequent flyer in Indigo but now I have decided to avoid.
Thanks but No Thanks!!