Mccudden was one of a very few who flew in every year of the war. As did Berthold on the German side.
Mcudden said this of Richthofen; The leader maneuvered very well. He also counted 24 bullets in his tail courtesy of the Baron.
As for Hawker having likely more than 9 kills, part of the problem was that he flew loads of lone patrols early on, hence no witnesses. Keeping track might also not have been a high priority for him, ( speculation ). Also it was the French who started the whole ace thing, then Germans & British began to follow suit. Awards & such for accomplishements,( Yes I know, Germans never accepted 5 kills as ace status).
Anyway, back to original point. It was Richard Townsend Bickers , hope I spelled that right, who wrote Red Baron The Legend Reevaluated that stated, Richthofen won because of the wind blowing in his favor. He's a well known author, flew in coastal command during the war, but full of beans regarding the Baron. Sure the wind was a factor, but heck Hawker had 35 minutes to line up a kill shot on Richthofen or his plane, & was able to do neither. Jeez, I wonder if Richthofens flying ability had "anything" to do with it??? Nah, couldn't be. had to be the wind.