A company is an organization of people, often spread across multiple continents, cultures, and legal frameworks. Some of what we consider unethical in the West is seen as necessary in other parts of the world. Even if a company outlines its supply chain and manufactures its product in countries with relatively decent labor laws, there's still going to be the issue of vendors or distribution or some other thing that would trip up an absolutist. Some are obviously better than others, and there are websites that track this information, but at the end of the day, idealists are going to taste reality. Labeling it as "ethical" or "unethical" is ultimately oversimplifying.

A much better way to evaluate consumer choices is by whether or not it effectively meets your needs. The hypothetical ideal is one where you buy no more or less than what's necessary, and that comes down to being thoughtful about what your wants and needs are and not compromising for temporary fixes. Taking this seriously will lead you to more satisfying purchases and probably save you money.

I hate anything that's cheap and clearly not built to last, or built in such a way that it has very limited use cases. A lot of consumer waste is generated by people buying things for the sake of "saving money," only to have to later re-buy the same product because it breaks or isn't actually what they want. Evaluate your options thoroughly and buy what you really want, that way you don't have to think about it again and come crawling back to the IKEA catalog or whatever. Valuing quality over quantity is sustainable and it's a good sign if a company seems to value that as well.

Consumerism has a bad connotation because of the excess in which people participate. And trying to figure out what goes on inside a company and then making a highly subjective judgment based solely on that is still guesswork at best. The best way to avoid contributing to that excess is simply to buy with little intent of buying the same thing again.