Rahul,
The cadet program is a fantastic opportunity for somebody looking to break into aviation. Your first commercial aircraft will be a 320. Many of us had to spend years flying pistons and turboprops prior to getting the opportunity to fly a modern transport category aircraft. You would be one of the fortunate ones in this industry if you got the chance to join the cadet program. Go for it!
The people complaining on here about 320 life at EY are generally those with years in the industry and they probably came from a region where you can have a very decent lifestyle on narrowbody aircraft. Quite a few airlines offer 14-18 days off per month with 80+ hours of flying in an average narrowbody roster. Coming to EY where you get 8 days off and an extremely fatiguing mix of night and day patterns can be a shock to the system for somebody with 5,000-14,000 hours of flight time with previous companies. I'm guessing most of these individuals assumed they were finished with this type of flying. They probably came to EY thinking they would enjoy quick advancement and the luxuries that come with working for a well funded national carrier. Instead they found a hard working, low cost operation with slower than expected career progression.