Low FPS and Bad Ping

When I go in game, background applications closed, my ping fluctuates and I cant play the game. I went into the training grounds to test it out and my FPS locks at 30 and below, when the settings have it capped at 300. I tried changing the video quality, same result. It wont let me to try and scan and repair Overwatch, help please?

What’s happening when you attempt to scan and repair?