Fullscreen settings changing to Borderless Windowed

When I start up the game it’s defaulted to borderless windowed mode and has an FPS of 1 frame a second. It painfully slowly loads up and then I have to navigate the main menu at 1 FPS to get to the settings to change it to fullscreen where it runs at 60 FPS.

I have no idea why it’s running so slowly on borderless Windowed but I don’t really care. I just want it to stop resetting it’s graphics settings every time I start it up.