Air India - Direct flight to Abu Dhabi changed to Via Baharain

I booked the direct flight from Abu dhabi to New Delhi and return New Delhi to Abu Dhabi. But Air India has changed the flight to Via Baharain. Due to this I reached my Destination Abu Dhabi 3 hours late.

Actual Flight timing was 20:15 (NDL) - 22.35 (Abu Dhabi)
Changed Timing 17:45 (NDL) - 22:25 (Abu Dhabi)

Air India just send me the email that timing is changed to 17:45 but didn't mention that it will be via Baharain.

I was travelling with my pregnent wife and daughter. We faced too much trouble during this jouney.