Feels like Indentured Servitude - Business Analyst bei Adecco: Mitarbeiterbewertung

A friend helped me find this temporary job at a large mutli-national company which required that I go through Adecco to take the job. Adecco had nothing to do with me getting this job, yet they receive a hefty percentage of my hourly wage. Although Adecco considers me an employee, I consider them an administrative service (invoicing and tax paying) and I feel that I am paying way too much for that administrative service and not getting anything back from Adecco as an employee.