In your other thread on the same topic, when you restarted this time, I said:
Your new airline is going to have issues with delays. Looks like you have turns as short as 45 minutes, which is a 20% plus chance of delays in an MD-80. I dunno why you're turning that quickly, since you have 4 hours of dead time after the end of your 3rd route. You've also picked one route with competition, and one route that can only handle 2 planes per day. When there's a route that fits perfectly for 3 times a day x 3 planes sitting empty.
You didn't change any of those things.
You also grabbed just one plane with your initial money, despite having enough money for 3. 3 planes = triple fuel & landing costs, but it also gives triple revenue, and staff & commonality costs are not tripled. That means each plane has to be less profitable to pay the overhead.
You have a CCC rating, you're still in the black. That means you can get loans, to get more planes and decrease overhead costs per plane even further. But available loan amounts are ased on your ticket sales. 1 planes worth of ticket sales = very small loan. If you started with 3 planes, you'd be in a similar situation, CCC rating, still just in the black. But you could get a bigger loan, enough to get another plane or two. Rinse & repeat until you're at 10 planes. Best to check for loans on a Monday morning game time, before the midday loan payments, as that's when your available amount should be highest.