Bus un reliable

I have been travelling to Hyderabad all the time almost by bus. The reason is its faster than train, two to three hours. But after travelling almost 10 to 15 times I have realised that its the same. The travel time by bus is less but it's very un reliable. Today the 8.00 pm bus is shifted to 9 and last time the 7.00pm to 9.00.
I have almost travelled all the bus companies from kpn to kesaneini all the same.
I think I should think of train again. It's cheaper half the the price than bus too.