Yup, I definitely think that there are some tools which are great to buy at harbor freight, and then others to stay away from. Like others have said, it also depends on what kind of work you do and what kind of uptime you require for your paycheck.
It is definitely hit or miss. Also, scaling expectations helps. For the most part, any tool I buy there, I consider to be disposable, or at least the first one to figure out if I want a nicer version. I bought the midi lathe many years ago to try out, and it still serves me well today. I do plan on getting a laguna in the future, but this one is working well enough for me now.
I did have a fiberglass handle shatter on a hammer once. I just laughed and threw it away and bought another one the next time I was there. Haha.
Now, as to help you, here is one option: I would try would be to use a hardened steel center punch and see if you can knock the piece of hex key loose and out of the screw.