Dicko was/is competent as a sailor, just not as a leader or even member of a team as far as I can see.
Silly thing is that whenever I've seen him interviewed, he always seems very likeable.
I guess it comes down to the heat of the contest and the effect it has on some people.
The heat of " battle " in sailing can really change someone and I would bet that every regatta has their fair share .
I will pass on sailing with those known " screamers " and personally I tend to believe that a quiet boat / crew is a fast boat as well as much more pleasurable one to spend those long hours on.