"Your" TN ?? Didn't realise one needed a Domicile Certificate to board a train ЁЯШВ
As far as punctuality of AP is concerned, it's indeed a serious issue but get over your petty issues with Tamil Nadu Express, Telangana Express, Kerala Express or any other train. You seem to be more concerned about Tamil Nadu Express being on time rather than Andhra Pradesh Express being late.
Don't know about all but some attribute can be given to a slot just near a Daily Rajdhani Train, now that won't affect if a train is...
more... on time, in case of delay it'll indeed cause a cascading effect culminating in the delays you see before you.
Kindly adjust your attitude, shared with positivity from my side- take it with positivity or negatively your choice.