Spoken like someone who know nothing about PR. First off, parties always choose the candidates. Voters choose who they vote for. If you don't like a candidate, don't vote for them. 

The things that PR does are give you choice and make your vote count. You get to choose from more than one candidate from a party and you can vote for them without being told you're wasting your vote. 

There are reasons why almost every industrial democracy uses PR. Getting mad at the government for not explaining PR to you is exactly what the Liberals want you to do. They could have spent money on explaining PR to you but chose instead to spend it on phony surveys about values. Get angry at them for leaving you in the dark, not at PR which actually is simply a dramatically better way to hold elections. But since the Liberals don't want you to know about it, visit fairvote.ca instead to learn more.