Made in the US does not always equal ethical or quality. Just look up garment working conditions in places like LA. Also, a ton of miUSA garments use the same cheap-projectile loom- synthetic trash fabric as any other fast fashion brand. They just stamp the "Made in the USA" sticker on it and make a sucker of you.

On the other hand, there are a ton of awesome miUSA brands making the best quality stuff. Check out Carl Murawski's YouTube channel/website for a list of brands. He mostly reviews USA made stuff, and is a good intro/deep dive to solid brands: https://carlmurawski.com/