I don't think anybody really disagrees with you that QA should be more prevalent. But what I've been telling you since forever ago is that level of QA is literally factually impossible. When hundreds of thousands of parts are processed through a dozen middlemen before they reach you, the buyer, there's a dozen points where things can go wrong with QA. Every single link in the chain would need hundreds of people devoted to hand testing individual units day in and day out. It would be a 24/7 job with how much inventory is actually moved at each wholesaler.

I think each and every one of us would love to have great QA. It would be awesome. But it's impossible.

On the subject of chargebacks that's honestly a dick move. You were dissatisfied with store credit and having to pay return shipping on a single $12 battery. Look at it from their perspective. If you were in their shoes would you want to pay for return shipping on a single item that's $12? Probably not. Many of these suppliers provide store credit, and even comp the return shipping if the value is high enough. Have you ever tried to return something on eBay, and the seller just tells you to keep it? That's because to them it's not worth the fucking hassle to pay for the return shipping or make you pay for the return shipping on a single item that you paid chump change for.

The reason these suppliers operate on store credit is because if you buy $2000 worth of product from them, and you end up with having to RMA $200 worth of that later, you can do it at no cost to you and they'll give you credit to put in another order. It makes perfect sense when doing high volume transactions.

If you're legitimately screwed then yeah, a charge back is fine. That's what they're for. Abusing them because you don't like having to pay return shipping on a single $12 thing is ridiculous and pretty shitty, only because the business model that these suppliers run on is not compatible with what you want.