Character Controller moves slow?

Player walks so slow, sometimes doesn't even walk. Jump is impossible. Altering speed doesn't do anything. Help ;(

 void Start () {
         characterController = GetComponent<CharacterController>();
     }
     
     void Update () {
         transform.eulerAngles = Vector3.zero + (Vector3.up * camRotY);
 
         {
             moveDir = new Vector3(Input.GetAxis("Horizontal"), verticality, Input.GetAxis("Vertical"));
             moveDir = transform.TransformDirection(moveDir);
             characterController.Move(moveDir * Time.deltaTime);
             moveDir *= speed;
 
             if (!characterController.isGrounded)
             {
                 if (verticality < 0)
                     verticality *= 1.01f;
                 verticality -= Time.deltaTime * 6;
                 camera_wobble.cullingMode = AnimatorCullingMode.CullCompletely;
             }
             if (characterController.isGrounded)
             {
                 if (Input.GetAxis("Jump") != 0 && slope_angle < characterController.slopeLimit)
                     verticality = 1.8f;
                 verticality = 0;
 
                 //cam wobble, no movements here
                 {
                     if (moveDir != Vector3.zero + (moveDir.y * Vector3.up) && slope_angle < characterController.slopeLimit)
                         camera_wobble.cullingMode = AnimatorCullingMode.AlwaysAnimate;
                     else
                     {
                         camera_wobble.cullingMode = AnimatorCullingMode.CullCompletely;
                         Camera.localPosition =
                             new Vector3(Mathf.Lerp(Camera.localPosition.x, 0, Camera.localPosition.x * 0.2f),
                             Mathf.Lerp(Camera.localPosition.y, 0, Camera.localPosition.y * 0.2f),
                             Mathf.Lerp(Camera.localPosition.z, 0, Camera.localPosition.z * 0.2f));
                     }
                 }
             }
         }
 
         //cam rot, no movements here
         {
             camRotX -= Input.GetAxis("Mouse Y") * sensitivity * 0.8f;
             camRotY += Input.GetAxis("Mouse X") * sensitivity;
             camRotX = Mathf.Clamp(camRotX, -90, 90);
             Camera.eulerAngles = new Vector3(camRotX, camRotY, 0);
         }
     }
     void OnControllerColliderHit(ControllerColliderHit hit)
     {
         slope_angle = Vector3.Angle(Vector3.up, hit.normal);
     }
 }
 

I was trying to make the player moves horizontally slower while in air, so I put the moveDir *= speed into the .isGrounded and ! .isGrounded brackets and adjust each from there. That's when the problem occur. I move it back to where it was and the problem isn't gone.

Help? Please ; (