I am current employed as a bioinformatician.

My contract says: "you are employed as a [role],to report to and carry out the instructions of the supervisor [manager]. Based on this agreement, you will be given tasks from time to time".

My biggest complaint with my current manager is that he treats me like his private property. This text actually sounds like I AM his private property.

My question is: is this kind of role description normal/expected in UK? If it's not, would I be legitimately allowed to ask for something different, and how should it read?