Many of the delays are over 4 hours and are super annoying as passengers had to wait long past midnight. The worst offenders are TK88 to Beijing and TK 26 to Shanghai, though TK 72 to Guangzhou also gets a few severe delays over the past 2 weeks. Last night, TK 72 that scheduled to depart IST at 1:30am used the plane comng from Haneda that was scheduled to arrive at IST at 5:30am, so there is not even an attempt to be on time. I am surprised that TK has been able to get away from this.

https://www.flightaware.com/live/flight/THY88
https://www.flightaware.com/live/flight/THY26
https://www.flightaware.com/live/flight/THY72