You are absolutely right in getting shocked with head line as mere 0.1% voters i.e approximately 30k voters has decided the Telangana Assembly Election Result concluded in 2023.
It is known fact that Congress has won 63 out of 119 Assembly election and secured majority to form government. Apparently, it looks public Mandate of 3 crore voter population.
If you do deep dive in Assembly wise data then you will realize that there are two constituencies Jukkal and Devarkadra where Congress won by just 1100 and 1300 votes and there are 4 more constituencies where congress won by 3k,4k,5k votes which implies Total 20k voters or less than 0.09% voters decide fate of 6 constituencies where congress has won and crossed Majority.
If these 20k voters has voted the other way then Congress would have slipped to total 57 Assembly seats and State politics would have witnessed unprecedented alignment between BRS,MIM and BJP to deny congress forming Government.
Please refer this Wikipedia link for detailed Constituency wise winning data.