When there is an opportunity to make money people would not waste it. Just like in the old days people ran 1 or 2 telephone stations they will run charging stations everywhere in the near future. It's easy money to be made
The 3rd party chargers (eg. at the Jio gas stations or at that dhaba on the NH) tend to have varying levels of maintenance, as these are franchisees and installed them as way to get some free money from corporate (eg. the one in my family's ancestral village in HP - they installed it to get some free cash from Reliance, but they aren't providing any maintenance).
That said, the EV chargers at the dealerships are well maintained.
This is the same issue in the US with Tesla's Supercharger network being superior to Electrify America because the former is directly owned and managed by Tesla, whereas the latter is a franchisee model. Whenever a Tesla Supercharger goes down, Tesla will send a mechanic to fix it. Whenever an Electrify America charger goes down, it takes weeks to get repaired.
A dealership driven charging network would probably solve the issues in India, as just about every small town has 4-5 different dealerships located on major highways and roads, and it would have better QC from corporate (as well as the fact that dealerships need to maintain their own charging infra in order to sell the car).
