Ok, well I've left nine 1-star and many other 2 or more star reviews and none of them have been removed for any reason, so I would say you got unlucky and that

Ok, well I've left nine 1-star and many other 2 or more star reviews and none of them have been removed for any reason, so I would say you got unlucky and that I stand by my comment that Amazon don't do anything like automatically redirecting all 1-star reviews to customer service.