EMB-505 Captain reported the aircraft required excessive control forces as compared to same type aircraft. After several maintenance services a new maintenance team identified that the hydraulic rudder boost actuator was failed.

Narrative

Rudder/Steering issues were written up on day one; flight one; of the aircraft being assigned. Taxi to the runway demonstrated unusual and excessive control forces required. Deviating significantly from other aircraft of the same type flown over the last few years. Maintenance took custody of the aircraft. Inspection was completed and the aircraft signed off for next day operation. Aircraft received by myself. Control inputs were still heavy; but did not feel as heavy as before. I believed this was the result of major service done to aircraft recently; the aircraft was released as checked and safe. We departed with no issues from original location of ZZZ1 with a short taxi and favorable winds and weather. Second flight of the day proved to be the issue. Now faced with a crosswind landing at ZZZ; the aircraft was more difficult to control; and it was clear that further inspection was necessary. Aircraft was written up for maintenance again. New maintenance team identified that the hydraulic rudder boost actuator was failed. This was the cause of the unusual control forces. No injuries or damage resulted from the operation.