I agree, this seems like a questionable thread. On one hand, Apple can screw up like anyone else, and often do, but they usually make it right on some level, although that might not be on a fair level. A lot of companies use 3rd party companies for repairs, trade-ins, etc. So this might be such an issue. Also, if a package gets lost in transit, that is the shipping company's fault and responsibility, not Apple's per SE. They will try to get it resolved through the shipping company first before taking any other action. Yes, it sux, but that is what most companies do.
Whether this thread was posted by a truly disgruntled Apple device owner are just a person who is trolling the forum, who knows. If the former, I suggest cooling off and continuing to try to talk with Apple CS. Being nice will get you farther. Remember, the poor person being paid a crappy salary on the other end of the conversation is just a CS rep, they are not responsible for what their employer does. So try to be polite and say I'm disappointed in the situation and need to get this resolved, don't just yell at them. If they can't help, simply ask for the case to be bumped up to a supervisor.
A few weeks ago I ordered an iPad mini 6 and it didn't arrive on time. Days passed and FedEx obviously seemed to have no idea where the package was. I called Apple CS and was polite and they dug into it and actually gave me the location of the package and noted that it had been delayed due to winter weather in Memphis. BTW, FedEx CS had been totally worthless dealing with the issue and not very friendly either. Apple CS asked me to be patient and kept me informed and the packaged finally arrived a few days later.