Well hopefully the OP has learned a valuable lesson here? That being to never again waste time suffering the vengeful wrath of clueless internet experts......
Let's take a moment to review the finding of all the "experts"
#1 The OP failed to hitch correctly, and compounded such by failing to inspect his work.
Here in the real world there is absolutely no way to determine if he did, or did not perform these tasks correctly, but many of you are quite sure that you know more than a professional who does this everyday. Laughable at best.
#2 The recall of defective Lippert couplers is an anomaly, and this fine, trustworthy company, with no history of issues, couldn't possibly be having another problem in this area.
This may be my favorite. Wow, just wow. An outfit that is legendary for structural failures of their products, what could go wrong?
#3 It's all because he didn't have weight distribution. No sane professional would ever tow without one. After all I use it, so it's the right thing to do. He is obviously incompetent.
Here is a news flash for all you "towing pros" The percentage of transporters using weight distribution when delivering TTS is statistically insignificant!!! The last couple I saw with using one told me that they are the only one in their company to use it, and it can be an issue, since some dealers complain about damage to the paint on the tongue when you take it off.
#4 The OP needs to contact NHTSA immediately, because that will make a difference.
Really, seriously? What was it, thirteen deaths, a dozen years and hundreds of reports until GM just addressed the ignition issue in some of their early 2000s cars. Really, seriously. What did NHTSA do about the deaths and destruction caused by their factory hitch receiver failures on the 99-2006 trucks.......... Oh, wait, I know the answer, NOTHING.
I'm sure that this list has a few more, but given the general tone of this whole thread, it's all falling on deaf ears anyway. A lot of you need to get over yourselves. The guy had an issue and asked for information, not your ridiculous "fact finding" and ruling on things you know little, to nothing, of.