I assume the OC employs the caretaker through the EC. If there are many duty of care aspects of common property that are not being maintained, then the first thing I would do is write to the EC to ask that the common property be maintained, specifying the problems. The OC, through the EC, has an obligation to maintain the common property. If the EC is not requiring the maintenance to be done, then they are the problem. If the EC is trying but the caretaker is not following their direction then you may have allies. Ultimately, you can put a motion to a general meeting. The EC must act on the direction of a general meeting (unless it would be illegal).