Setting rotation of game object relative to ground does not work

I have set up a humanoid moving around the game world. On right click its move point will change, will start walking towards it and it should rotate towards its target. But I also wanted to take into account terrain curvature, so I rotate the object in x and z axis based on terrain normal and rotate the object on y axis based on the target.

 protected void Move()
     {
         Vector3 heading = new Vector3();
         heading = (movePoint - this.transform.position);
 
         Ray ray = new Ray(transform.TransformPoint(GetComponent<BoxCollider>().center), -transform.up);
         RaycastHit hit;
 
         if (Physics.Raycast(ray, out hit, GetComponent<BoxCollider>().size.y, terrainLayerMask))
         {
             float rotStep = rotSpeed * Time.deltaTime;
             Vector3 objectForward = transform.TransformDirection(Vector3.forward);
             Vector3 newDir = Vector3.RotateTowards(objectForward, heading, rotStep, 0f);
             transform.rotation = Quaternion.Euler (Quaternion.LookRotation(objectForward, hit.normal).eulerAngles.x, Quaternion.LookRotation(newDir, hit.normal).eulerAngles.y, Quaternion.LookRotation(objectForward, hit.normal).eulerAngles.z);
         }
         float moveStep = moveSpeed * Time.deltaTime;
         Vector3 tempPos = Vector3.MoveTowards(transform.position, movePoint, moveStep);
         transform.position = new Vector3(tempPos.x, GetTerrainHeight(), tempPos.z);
     }

The code that calculates the rotation and sets it is inside the if (Physics.Raycast) part.

First I assign object forward transform in a variable "objectForward".

Then I calculate rotation towards the target and store it in "newDir".

After that I set objects rotation. The problem is, the rotation around the x axis is not setting, it stays on 0 all the time. The y and z axis are set up properly. Y rotation is based on target position, z rotation is based on terrain normal and x is also based on terrain normal but it's not working even though I use the same function for both of those variables.

I've suspected that i've used a wrong function for calculating x rotation so I've used "Debug.Log(Quaternion.LookRotation(objectForward, hit.normal).eulerAngles.x)" to check if it actually has a value and it does so I have no idea why it's not working properly.