As you navigate deeper into the MENU setting, you don't need to tap multiple times to navigate back out. Simply tap on the Multi-Function Q button or half-press the shutter button to quickly go back to Live View screen.
While previewing the photo, you can tap on the Multi-Function Q button to display the menu where you can select Delete to remove the photo.
When you have increased/decreased the EV value by a lot, you don't need to tap multiple times to get it back to 0.0, simply long-press the EV icon for 1.5 seconds to do the job immediately.