Well Capitalism prevents me from having a say in tons and tons of different economic things that affect me, I'd say the workers at Foxcon factories don't have too much freedom, most workers are forced to give up their freedom for most of the day so they can get a peice of the wealth they produce, most people who can't afford property are forced to give up some freedom in order to have a place to live.
If you got rid of private capitalist property, and evyerone had a say over economic issues that effected them, you'd have tons more freedom.
Let me give you an example.
Libertarian have no philisophical problems with a Pullman style town (the capitalist basically owns everything in the town, the stores the housind the main factory and so on), simple because its private property, even though it ends up being a tyranny, but make all that stuff democratic libertarians have a problem with it because it turns into "government." Even though the latter gives more freedom to more people.
I wish to live in a social order where private capitalist property (distinct from possession) is public, and things that effect the public are accountable to the public, and economic activity is done democratically (since economic activity is by definition social), if your claim to property ends up making things worse for the majority of people in an area, I want that property to be accountable to those people.
BTW private capitalist property hasn't always been around, you've had tons of societies without it.