Air India — Customer service harassment and hassles due to the same

Experience traveling to India via Air India
(Airline reference # HHZH9P and HIERGI)
I decided to travel to India sooner the Covid situation eased up in February 2022.
Bought 2 Business class tickets for myself and my wife who is unwell. I started our travel on 25th of February 2022 from Atlanta via Delta Airlines. The full schedule starts to end was as described below
1) 25th February 2022 via Delta Airlines -- Atlanta to Chicago
2) Chicago to Delhi on 25th February 2022 via Air India Business class (scheduled to start around 9:30 PM Central Time)
3) Delhi to Kolkata on 27th February 2022 early morning via Air India business class
4) Start back from Kolkata to Delhi on 11th March 2022 via Air India Business Class
5) Delhi to Chicago on 18th March 2022 early morning via Air India Business Class
6) Chicago to Atlanta on 18th March 2022
While starting from Atlanta Delta agent booked all the check-in baggage through to Kolkata and by definition, I am supposed to pick up the all the baggage at Delhi because of customs requirement and then put back the same to the transfer desk and release all of the luggage at Kolkata upon arrival. I followed the instructions.
In Delhi 1 of my baggage did not arrive like many passengers from the same flights.
I have files a claim and finally received the baggage after 3 days at Kolkata. While researching I learned that it is quite common for Air India travel.
While coming back from Kolkata on 11th March 2022 to Delhi, I have had excellent experience at the Air India counter. The lady processing my bookings and boarding pass explained me that “If I my travel to USA is a continuation on the same day she could have booked the baggage Through to Atlanta similar to what happened while coming from Atlanta, but as I am staying for a few days at Delhi, I should get the same service surely when I check in at Delhi Air India Check In counter on 17th evening for 18th morning Flight to Chicago and then to Atlanta”.
But the reality was completely upside down. When we arrived at the Air India check in wing “F” and reached the first counter for Business Class check in, the young lady looked at my ticket and her first reaction was “Though my final destination is Atlanta, the Baggage could only be booked up to Chicago”.
Upon explaining that both the airline companies are Star Alliance and as the ticket was booked under a single PNR, the baggage should be booked through to Atlanta similar to what happened on my travel to India on 25th February 2022 which will also going to provide coverage to my any excess baggage weight limit that is allowed for Business Class, we were refused and over and above the attitude and rude behavior of the counter staff, the supervisor and the station manager confirmed that we made one of the worst decision of our life when we decided to fly Air India.
Now the fun part is that, I am able to connect to an Air India staff back in Kolkata, and they did a honest try to explain that the booking to Atlanta is absolutely possible and how that could be done to the counter agent, but they denied acting on the same.
The pain continued when we reached Chicago. We did not find any Air India ground staff who could help or suggest any action. Myself and my cancer survived wife learned that we had to drag the four baggage with 2 cabin luggage from terminal 5 (Air India terminal) to terminal 2 (Delta Airline terminal). Chicago airport authority do not allow any cart in the elevator or on the train between the terminals and so the only option was to drag all the luggage all the way to terminal 2 Delta counter.
And the misery was not over even then. Delta agent clearly stated that as the luggage are not through and so I had to pay $440.00 to book the baggage as an excess baggage charge were applied because of the above issue forced on us by the Delhi Air India counter staffs.
My wife is now sick and incurring a lot of pain she is trying to recover from. I am not even considering or describing my health issues.
Is this the expected service a Business Class traveler from the Air India Staff? I could not even imagine what kind of harassment Economy class passengers may be facing either.
I am so sick and tired of the horror we have experienced. I will definitely be sharing our experience with all my friend and families and their Extended friends and families to ensure that all of them should be aware of the expected behavior of Air India ground staff in the capitol of India and intended hassle they must face against the loyalty shown to an Indian airline company. It is unfortunate that after spending $3300+ for the ticket to India we deserve lifelong nightmare related to Air India travel.