You're asking several divergent questions here, or, what's actually far more likely, questions that are intended to converge upon the pushing of one ideological agenda. Also, I'm sorry to say you're unlikely to find a true blue anarcho-syndicalist to answer your question on this site, so you'll have to settle for me putting on the costume and playing the part ;)
Anarcho-syndicalism is defined by wikipedia as a democratic system. The proponents of anarcho-syndicalism (and I have met some and heard them talk precisely about this) do not see this kind of coercion of the majority against the minority as a problem, especially when the minority are capitalists.
In other words, they would argue against you that, on the contrary, anarcho-syndicalism is the less coercive system than anarcho-capitalism, because anarcho-capitalism involves not only the coercive forces involved in the ownership of large amounts of private property, waged labor, and so on, but also all the coercive forces of the state--police, armies, prisons, law--except privatized into para-state versions of the same.
As to the question of whether a syndicalist sort of system can possibly enforce itself without a central coercive authority, I think you greatly underestimate the power of decentralized coercive authority, which is indeed the main form of authority which we encounter today and which looks to me pretty damn effective at keeping people in line and getting them to do what they aren't initially inclined to.
Now, if you hadn't framed this as a "question" that was actually an answer with the answer being the superiority of anarcho-capitalism, a perspective with which I can hardly get down, I might have discussed some of the non-anarchist aspects I find in anarcho-syndicalism, such as its adherence to majority rule, its (self-)management of the economy, and ultimately its offer of only more and more control exercised merely in a different fashion. I might have discussed why I don't think anarcho-syndicalism is "even" possible in the context of the destruction of the labor movement. I might have offered a non-syndicalist view on the matter of property and power, beyond the trick question of choosing the lesser of two coercive systems. However, as they say, you reap what you sow.