Canada

They've inserted themselves into every corner of the consumer goods market. From books to electronics to hobby tools. You'll be hard pressed even in major cities to find local sellers for all sorts of things. Of course this didn't happen overnight. Of course everyone who has used one of their products or services are complicit. But at this point saying that they're not an essential service isn't entirely true. So many businesses, small and large, couldn't compete, and shut down or switched to selling on Amazon. So when they vacate a market there's a vacuum left, and very few businesses to step in immediately to take up the slack.
Some of the businesses left to fill that void are just as bad, Walmart et al.

Was it avoidable?
Sure! It was, absolutely.

Was it obvious as they slowly took over and crushed multiple markets?
Sure, but people are essentially lazy, and will almost always go for the easiest option even if it's actively harming their quality of life and options available to them.