@Sam3313
Yes, that's how the system is set up, and that's why (well, one of the reasons why) the Airbnb review and ratings system has zero integrity or credibility.
As for your poor review - you have a very strong case to have it removed. It's in direct violation of Airbnb's Content Policy as the entire review mentions details of a dispute between host and guest, that resulted in Airbnb intervention.
The clause you need to quote when you call Airbnb to have the review removed is this one (and It's the one clause in the entire policy that they invariably will act on)
The following content is never allowed on Airbnb..
• Content that provides specific details or outcomes of an Airbnb investigation
They may or may not remove the star rating too (it can be done, but many CX agents will insist that it can't), so it's up to you whether you want to fight your corner on that also. Best of luck!