It's not.
In France it's the same thing. But the "Amazon is bad" is not really about destroying businesses (since it was done decades ago by malls, now cities are just banks, insurances and clothing crapshops like Zara) but about the fact that they are not paying taxes and they provide awful work conditions to people.
So you tend to be considered as someone who doesn't care if you buy at Amazon. (But we're still waiting for proof that companies trying to compete with Amazon don't act the same way).
People are sick and tired of Amazon deriving huge profits out of the UK market ($17.5 billion in 2019) and paying just a minuscule amount of tax on those UK sales (£6.3 million in 2019) using a mixture of clever accounting techniques (not available to other businesses) and funnelling profit out via subsidiaries in low tax jurisdictions (Luxembourg).
These threads of Amazon-bashing always read like something out of parallel universe, I should go have a worse shopping experience because of some "greater" objective of opposing Amazon?
I don't want a future dominated by mega-corp with 99% market share but traditional retail need to get their shit together at some point.
Shoes fall in the category "things I want to physically try before buying". And that category of things does not work with on-line shopping.
I drive 20 minutes to the mall. After finding parking and getting into a shoe store, there’s no one really there to help me. Once they get around to me, they don’t have my size. And it’s also apparent the person working there has no interest in helping. Whether they have my size or whether I found what I was looking for is basically not their problem. So I drive at least 40 minutes round trip, plus the hassle of parking, finding the store in the mall, and waiting on someone to help me.
Now my time is valuable. I lost my time. I paid for gas. I also put miles on my car. And depending on the day, I also had to deal with traffic.
IMO businesses refuse to compete. If Amazon is doing it better than them, then hats off to Amazon. If a business is doing better than Amazon, then I’ll go with that business.
IMO the “negative externalities” puts blame on Amazon while pretending like these other stores even try to compete.
Btw this binary view of the world where Amazon is bad and others are good (or vice versa) seems to be a very American thing.