The Blurs I have didn't come with excessive threadlocker. They had enough to keep the screws from slipping, but they were easy enough to overcome with appropriate sized Torx drivers.
It sounds like whatever seller you bought from sold you a used, damaged, and previously returned Blur. If the screws are stripped and the knife isn't opening right, it's entirely possible the previous owner had disassembled it and didn't properly put it back together (or messed something up before/during re-assembly). I would definitely return it to the seller.
I wouldn't use a customer-returned (and possibly damaged) sample as a basis to judge the knife. Return that one that you received, and have them exchange it for one that is really new from the factory (or purchase from another reputable dealer).
I think you're right about all of the above, I bought it from Amazon so who knows how closely they inspect returned merchandise before selling it again. I had a gift card that paid for 2/3 of it so that's why I bought from them, I usually get knives from BladeHQ or other knife-specific dealers. I photographed the product and then started the Amazon return process for defective products but asked for a refund and not a replacement.
Overall, I wasn't overly enthused with knife, I think I might order one of the special run tanto BDZ-1 models from KershawGuy instead, with him I know I'll get a fair deal on a solid product.