Cowspiracy is a pretty shitty documentary to prove your point. Pretty much as soon as it was released it came out that they fucked with the statistics to make things seem much worse than they are.
They will loosen and change a lot over time so just try not to worry about it.
As for the fuzz what exactly do you mean? Do you mean the odd loose hairs that stick out? If so everyone has them and they are a completely natural part of having dreads.
Unfortunately I can't help you with the dandruff part.