Resolution options broken?

Sorry if this is the wrong section, was looking for a bug report type section.
No more borderless fullscreen option, and windowed mode does not properly work for ultrawide, it claims to be at 3440x1440, but it's just 2560x1440, I can see my desktop on both sides of the window. At lower resolution it's not even shrinking the window, or rendering low and upscaling, it does with fullscreen (it's not pretty to look at).