TK massively overstretches its (wide-body) fleet by deliberately creating a schedule not possible to execute, especially during the summer months and on flights to continental Europe - to compensate for delays they use ground time at outstations. This will only get worse with the addition of more frequencies to SEA, DFW and TPE this month.
Same with TK44, 54, 56, 64, 68, 157, 164, 176, 264.