Turkish Airlines Cancelled My Flight Without My Consent

I received information that my flight TK2603 from Diyarbakir to Istanbul on April 16, 2024, was canceled due to operational reasons. I was offered to use the ticket on a different day, but since my flight was scheduled right after the holiday, I could only find a ticket for four days after my original flight. Despite expressing my desire to travel on the same day without paying extra, I was told 'there's nothing we can do.' I mentioned that there were seats available in business class on another flight that day and expressed my wish to book one of those seats, but this request was also denied.
I cannot understand why the flight was canceled during the busiest period for reasons beyond my control. Moreover, they are offloading all the inconvenience onto the customer while absolving themselves of responsibility. If the mistake is on your part, why are we the ones suffering? If the problem is with you, the solution should also come from you. Turkish Airlines is causing issues I have never experienced with any other company.