There is no surprise in that, they are used to it from many years. Everytime their launch of any new serials will be at the start or close of shows from other channels.
Kamali - launched when Puttagowri Maduve about to close and bought Ajjamma to Kamali with same timeslot.
Gattimela - When Agnisakshi was getting bored, this was launched. Once agnisakshi ended, there was lot of promotional flood of gattimela in social media.
Nagini 2 - Soon after the end of Bigboss
Paaru - Soon after Padmavathi getting bored
Moral of the story
Never launch a serial when you are bored, launch it when others are bored.