Well, Average is indeed a worthless metric, and that's why everyone is using median for these statistics unless they're arguing in bad faith

If you do want to use average, you'd at least need to remove 10% both from the top and bottom before calculating it, but it's still gonna be super untrustworthy.

Not sure what to take away from your comment, I'm still unsure what kind of metric you're pitching and why it'd be a valuable thing to track