Screen resolution problem in game

A problem with the screen resolution in the game my setting in windows is 12801024 75hz In the game, I cannot play on the same resolution as Windows, as I cannot play in full screen mode The game forces me to play in window mode When I adjust it manually from the settings to full screen mode The game automatically changes the resolution within the game to 1360768 When these resolution become... The game becomes more pixelated and I do not see the game in the correct mode, as I do not see almost half of the image. In addition, I lose the hz of the screen.