Indian Railways — train, late no, response of tte or attendant

Address:

Chittoor, Andhra Pradesh, 517501

I travellegd by train no 07210 from eluru to tirupati in 2nd a/c, pnr[protected]. The scheduled arrival for eluru is 21:31. Train came at 23:23. Finally reached tirupati at 8:34am against right time 6:30am. Why we canot minimise the late??
When the train arrived to eliuru, the a1 compartment doors found closed. I entered to some other compartment and occupied my seat19 in a1. No tte came, no attender found. Only at vijayawada the tte came and verified my ticket. More over that the attender started begging money from srikalahasti.
Why it happens like that.