The automatic FOV adjustment only works in multiplayer modes. If you want to play the campaign, it’s probably best to switch the ‘Play Style’ option in the vorpX menu to ‘Immersive Screen Mode’. Immersive screen mode doesn’t require a 100% perfect FOV.
Resolution can be changed/raised on the DirectVR page of the ingame menu. If your PC can handle it, that’s the way to go for better image quality.
General hint: always read the vorpX messages that you see in the headset and/or in the top left corner of the game window. Important hints like the above are typically shown via notifications when you start a game.