I just looked at your listing and saw nothing but good reviews. Of course, I didn’t read all 308 reviews, but I didn’t see any recent ones that were anything but glowing. Sometimes review order is dependent on which country is viewing them, though, so perhaps you are seeing the Canadian ones first?
Anyway, to answer your question, you are one of hundreds (probably thousands) of hosts with this exact complaint. Airbnb takes the position that the guest is entitled to voice their experiences, however warped they may be, although you can sometimes get a review removed for “relevancy”, discussions of refunds, violation of Airbnb policy, etc. If the review is not removed, the best way to deal with dishonest reviews seems to be to cordially, calmly and professionally respond to the review with the correct info, keeping in mind that future guests will be the main audience of your response.