I'm so annoyed... every time I go to Best Buy to try this camera out in person it's the one camera in the store that isn't functioning

The one thing I wish this camera had from holding it was a dedicated EV comp dial. How does the EV comp work on this camera? Is it a quick one button press thing to change?
Here's a thing that puzzles me. I bought an A7Rii a few days ago. With all the upsides and downsides to it there's one particular thing that kind of annoys me. And it's the dedicated EV comp dial. I just can't understand why it's there, and I have zero user for it. And I haven't been able to understand why anyone would want one.





