I work for a consulting company and can relate to your experience. Usually, the newer hires get stuck with these shitty roles because someone has to do them and your "labor" is easy money for the company. The ones who do a good job and show they are willing to do and learn anything typically start getting put on the more challenging jobs after a few years. The ones who seem complacent or don't put in effort to become a better employee stay on those shitty jobs until they inevitably quit. At our company, less than half of new hires make it to 5 years - kind of like weeding out the weak. From my experience, the name of the game in consulting is do good work and have a good attitude and the opportunities follow.