I was in that race and gave up!!! I too normally care very little about the odd person but it felt like over 90% of C and D graders were riding at an A and B grade level. And I remember seeing that guy frequently above 16w/kg - thought I was seeing things!!
Also had a D grader flew past me and in 15mins of watching him, never once went under 4w/kg. His Strava results suggested that he frequently entered A races (as well as the odd B and C).
When I checked Zwiftpower after I bailed, I saw what appeared to be a “live current summary” and fairly much all C graders were averaging 3.5w/kg and above (probably only you, me and one or two others were the exception).
I just wont bother with that race again. I dont see Mt Eden Cycles being very actively supporting that race so I wont bother with it again. And I had a rant in another Feature Request here that is trying to get support for auto-grading.
Maybe Flag the riders you see doing it next time?
That was the most annoyed I have got on Zwift!