As said, I think you are needlessly hard on a seller trying to make a living. Whether or not the tools had a defect is hard to judge, and between the seller and you. Loose tools can easily be tightened and are produced loose on purpose. Every person has they own preference, which you can already see from the responses in this thread. Making a rivet tighter is easy. Making it looser is hard. Bonsai scissors are opened and closed repeatedly many times: You want a tool that does this without friction, and the margin is narrow. So a loose rivet does not equal a faulty tool. How loose is too loose, that is tricky.
You pay more for your tools you get tools that are individually adjusted and inspected. You buy the more affordable tools, they are mass produced and may need fine-tuning. Personally I have similar experience with lenses. I bought a 1000+ dollar canon 5DII camera with lens as a set a while back and was not fully happy with the lens. I sent it back to canon, and was quoted 150E for fine-tuning. At first I though: Insane. I buy a semi-professional camera with lens in a kit to get the best match. They explained: In a kit we just pop a standard lens straight from the production line, and make it cost-effectve. Many people who buy a new body want new lenses, if they upgrade from a more basic model. So we provide a better lens. That being said: Each lens can be fine-tuned for focus and alignment. And on top of that, tuned to the body. What you buy in a kit is NOT post-production tuned. It is just standard settings which for most are fine and within tolerances set for the product you buy. But if you pay more, you get the extra work needed to get the maximum focus possible with the lenses in the setup.
As for posting this experience the way you did.. I am not sure you gave the seller a fair chance to respond. Correct. You return something, you would expect a response and taking 10 days to respond is long. So you reach out "Hey guys, what is going on?". But that is where I feel you went overboard. I think sending an email and expecting a response in less than a working day is a bit much. They do not sit behind the computer waiting for your email to come in. Then again, I tend to think of myself as a patient person when it comes to delays in responses..
If I look at my own mailbox, I aim to have all emails responded to within a working week. And I know it is not realistic at peek times.
If indeed your concern it is that urgent, you could indeed better have called them instead..
Guess I have a different vision on what fora are for.
Well.. You post something on a forum, you are going to get people that agree, and people that don't. THAT is what fora are for. Exchange of ideas. It is not about giving people a hard time.