Lost items at Dhaka airport by Qatar airways

I was forced to check in my Cabin bag at Doha transit to Dhaka, the same bag which I just traveled half of the world changing 2 flights including 1 Qatar airways flight, without any problem! Because of the bad attitude and incompetent behavior of the Qatar Airways staff of the flight QR342, I had to checkin my cabin for a flight which was almost empty and when the plane arrived at Dhaka I lost some valuable electronic items from my cabin bag! Thieves and incompetents!