OP, I understand your question, however, what you're seeing is the experience others have had in following the path from, "I wonder if...", and having some good luck, and some bad, to, "I carry the right tool for the right job..."
Some will be more expositional in stating their current position, some more courteous, some very terse.
Overall, having never handled a Direwire, but having lossa years with a wide variety of cutlery, I would say that a different specimen from DW would probably meet your desires. That assumes that you have received a bad 1 in 1000. My personal confidence in DW, after handling a knife such as you have received would be marginal at best, and such is the nature of custom/semi-custom products. In making a significant investment, and receiving a less that optimal product, consumers tend to clump all offerings into the junk pile. Sometimes it's warranted, sometimes not.
I'm not a ZT "fan boy", but I have ~16 specimens, and both enjoy, and have confidence in, all of them. I'm an ex-EMT, and modestly active outdoorsman, so I have some basis for assessing, "hard use". If a knife gets all loosey-goosey after butt-hammering out a tempered glass window, or completely loses its edge when crossing the steel frame in a car seat, bends or cracks when used to wedge open the space between a car door and the window, I don't consider it terribly useful. I also don't carry $$$ knife for those purposes.
Could my ZTs (or a fairly broad range of similarly priced models form other makers) do it on a one-off, at an off-duty roadside party? Sure.
All that to say, if you're willing to give DW another chance, and do some basic grip-tests (as you did), and it passes, you're generally GTG. If not, get your $$$ back, and get something else
you like.
Among others, I had a Terzuola ACFK that I carried for a few years. Could I have used it to cut someone out of a car? Possibly, but the cost of it, for me personally, was too high to seriously consider that usage. If I was debt-free, and making lawyer wages, heck yeah, I'd have an ACFK daily user and 4 or 5 replacements.
