I don't entirely agree. On a micro level, perhaps. It has been a very bad year for the staff at Target and Future Shop. The loss of a banner unique to Canada is a bit of a drag. Some malls, and retailers located in those malls, will suffer. And some neighbourhoods will lose these amenities.
But on a macro level, the loss of two foreign-owned chains ≠ a bad year for Canadian retail. Existing retailers will pick up the slack, and new retailers will enter the market (both from abroad and home-grown). From the perspective of Future Shop, we're not really seeing a loss of competition because it was owned by Best Buy. As far as Target is concerned, I'm not convinced it offered much competition in the Canadian marketplace in the first place. The history of retail in Canada is one of chains coming and going. Our retail sector has endured flat economies and the falling dollar before, and will again. Some power centres might even be redeveloped with more desirable uses, including retailers. This is nothing new. Target and Future Shop disappeared because Canadians had moved on to other choices and options (or, to be entirely precise with Target, had never arrived in the first place). I don't think the losses of a terribly-managed chain and a chain reflective of 80s/90s shopping patterns means that it's been a bad year. It means Canadians had already moved on.