How did you arrive at “So I decided that I will not order again given the poor cost-efficiency. And I never logged back in to their account.” as the correct course of action for a subscription? You can’t cancel a subscription by just ignoring it.
At the very least, if they just ship me my last week's selection, I wouldn't complain either.. But they choose to ship me random food.
The TOS makes it clear it's a subscription.
The "how it works" page makes it's clear it's a subscription.
And they tell you beforehand that they rotate meals in and out of the selection and pick for you if you do not select your meals by a certain date.
You're bent out of shape for not paying attention to what you were signing up for. You've brought negative attention to a company because you couldn't be bothered to pay attention to literally every customer facing page on the site.
> Our Chefs cook the meals available on each day’s menu in our community kitchen, every morning. Choose your meals or let our auto-pilot ordering select meals for you (you'll be notified of the selections in advance).
I actually recall I reading this sentence on my first order. And my impression is "what? they are using auto-piloted cars to do delivery? I should go watch how that works when it comes" and I just overlooked what it actually meant :)
[1] https://support.cookunity.com/en_us/how-does-cookunity-work-...
And as you have pointed out, they intentionally not email any notification and only emailed me when I cannot cancel the order is immoral, which is another reason I was annoyed.