Actually, IMHO the issue i see is your ticket income is relatively low. I am earning more than that on A321s. However, lease rates are astronomical in this game. A B-77W should cost not more than $1.3M a month, half what you were paying, and it's not even an ER! Most airlines lease aircraft or sell and lease back, there are many advantages to this. With such lease rates, one starts to wonder.
If I want to cancel a lease, or buy a leased aircraft the rate is still too high. Discounts on airliners is more in the order of 40-25% than a miserly 3% after I spend $200M in lease deposits!
It would be nice if this realism are incorporated.