I have same feeling as yours, frustrating,,,,, guests can give your 1 or 2 stars review because they don't like the smell you spray for air fresh, or they saw your bathroom vent dirty, deck has leaves, dust on the corner or under bed, ,,,,, or NO reason just because they think they paid too much,,,,from now on , guests review can be a tool that blackmail hosts, that's why i say Airbnb rating system is stupid and unfair for hosts, guests pay less but expecting 5 stars room and service, BUT we are not "5 star hotel"!!!
I believe hosts will runaway if Airbnb won't fixing its rating system. And airbnb never listen hosts complaints because guests always right!.