Why buy car with so much waiting?

I booked the car on 29 August and was told delivery in 3 months. I wasn't convinced to buy because of 1.5 ltr engine and high price for cosmetics. But then no other option available other than creta. To my surprise even after 2.5 months, the dealer was not sure when the car will come. He asked to wait until December. Why should buy a car were waiting for 5 months and still be unsatisfied. I took the right decision to cancel. Don't book the car until 6-12 months review if you have any doubts, becoz the doubts are real for sure.