The sellers are not really to blame here though.

Often they are just Chinese-speaking American entrepreneurs. The problem is the lack of IP protection in China. And lack of any interest in branding and brand differentiation, hence you got "brands" that sounds like they were picked via /dev/rand. And of course everything is probably manufactured in the same 3 or 4 factories.

Lev Andropov: It's stuck, yes?

Watts: Back off! You don't know the components!

Lev Andropov: [annoyed] Components. American components, Russian Components, ALL MADE IN TAIWAN!!!