Since laissez faire is a failed economic system which failed to hold up during the industrial revolution. Right-wing libertarianism also gives the power to the employer and the wealthy. Speaking from an economics stand point, this is terrible as it weakens the middle class and makes them less productive. It also lacks individuals due to the natural hierarchy, since most people are at the bottom and are forced to work for next to nothing. Sometimes they dont even get paid and then there is slave labor. Most people also dont receive an education, since they cant afford it and have to work 60+ hours a week.
Whereas anarcho-syndicalism failed in Catalonia Spain. The left-libertarianism also gives the employees all the power, looking at Communism and anarcho-syndicalism, employees dont always know whats best for the corporation and arent educated in management. By eliminating social classes on the large scale is also impossible.
Also both capitalism and socialism have traits that are inherently authoritarian and both ideologies always fail once you remove one from another. explain, if you say no. Since capitalism and socialism both have traits that are inherently authoritarian. You can't give the employer or employee all the power and assume something good will come out of it.