Complex sentence: Public's outrage against the rude and ill-mannered employees of DTC was already there, which resulted in the failure of strike and that was the beginning of the end of DTC in India's capital New Delhi.
Split into simpler sentences: Public's outrage against the rude and ill-mannered employees of DTC was already there and their strike made the public of Delhi to ensure that the strike fails. That was the beginning of the end of DTC in India's capital New Delhi.