The G20 protest arrests were heinous, but they were allowed to happen because of police state legislation dictated from the most autocratic PM we've ever had. It is absolutely possible to provide clean water to all First Nations in Canada, if a huge percentage of us weren't cheap AF and don't want our taxes to go up. And as argyle said below, people getting kicked off private airlines means that corporate power has run amok, NOT that liberal democracy has failed. That is an egregious false causality on your end.

You don't seem to realize that incidents like this are much more likely to occur/continue under autocratic rulers than democratic ones. Do you honestly think the Kurds will get MORE rights under Dictator Erdogan than PM Erdogan? Do you seriously believe that university professors will be allowed MORE license to criticize and condemn government actions under a dictatorship? 

But okay, Devil's advocate. Liberal Democracy is indeed dead. Describe the system that replaces it. Go.