Swipe movement help

I know questions regarding swipe movement are very common. But I assure you I have been through over 10 threads, multiple tutorials and what not and am unable to answer this question.

I have a player that moves around the gameboard, by a fixed distance, depending on which direction you swipe in.

Here is the current swipe script I’m using

void touchcheck()
{
	if(Input.touchCount == 1)
	{ 
			
 	//its always x=-1 and y=-1 if touchCount == 0 Resets
	if(deltaPosition.x == -1 && deltaPosition.y == -1)
 	deltaPosition = Input.GetTouch(0).position; //First touch  point stored
	afterDeltaPosition = Input.GetTouch(0).position;//the swiping points
	angle = Mathf.Atan2(afterDeltaPosition.y-deltaPosition.y,afterDeltaPosition.x -deltaPosition.x)* 180/Mathf.PI ; // angle in degrees from 0,-180 and 0,180)
	Debug.Log("Angle "+ angle);
			
	//right swipe		
	if(angle < 45f && angle > -45f && !restrictR)
	{
 		
         	if(Physics.Raycast(transform.position,Vector3.right,out righthitter))
		 	{
				restrictR = true;
				right = true;	
				R = righthitter.distance;
				RightObj = righthitter.collider.gameObject;
				if(RightObj.tag=="interactable_tile")
		 		{
		   			R = R +1f;	
		 		}
				if(R >= 1f)
					MoveRight();
		 	}
        
   	}
			
	//front swipe		
    else if(angle < 135f && angle > 45f && !restrictF)
    {
        restrictF = true;	
		forward = true;
		if(Physics.Raycast(transform.position,Vector3.forward,out fronthitter))
		 {
			F=fronthitter.distance;
			FrontObj = fronthitter.collider.gameObject;
			if(FrontObj.tag=="interactable_tile")
	 		{
	   			F=F+1f;	
		 	}	
			if(F >= 1f)
				MoveFront();
		}
    }
			
	//left swipe		
	else if(angle > 135f && angle < -135f && !restrictL)
    {
        if(Physics.Raycast(transform.position,Vector3.left,out lefthitter))
		 	{
				restrictL = true;
				left = true;	
				L = lefthitter.distance;
				LeftObj = lefthitter.collider.gameObject;
				if(LeftObj.tag=="interactable_tile")
		 		{
		   			L = L +1f;	
		 		}
				if(L >= 1f)
					MoveLeft();
		 	}
    }
			
	//back swipe		
	else if(angle > -135f && angle < -45f  && !restrictB)
    {
        if(Physics.Raycast(transform.position,-Vector3.forward,out backhitter))
		 	{
				restrictB = true;
				backward = true;	
				B=backhitter.distance;
				BackObj = backhitter.collider.gameObject;
				if(BackObj.tag=="interactable_tile")
		 		{
		   			B=B+1f;	
		 		}
				if(B >= 1f)
					MoveBack();
		 	}
    }		
      
    }
    else if( Input.touchCount == 0)
    {
        if(deltaPosition.x != -1 && deltaPosition.y != -1)
        {
            deltaPosition.x=-1;
            deltaPosition.y=-1;
        }
    }
}

The problem with this is,
The left swipe DOES NOT WORK. If you swipe to the left, it does the same as a right swipe.

I want my swipe to end when I move my finger a certain distance across the screen. Currently what’s happening is, I can do 2 swipes really fast, and confuse my game to move the player in a weird fashion.

Also, is there a way to get the user to remove his finger before he can start another swipe?

//left swipe
else if(angle > 135f && angle < -135f && !restrictL)

No value of angle can ever be greater than 135 and less than -135. Did you mean || instead of && ?