How long was your bike sitting there? Are you sure it wasn't impounded? Many places have winter bike rack / bike parking restrictions. You mention a flat bed truck, it may be that the rack was taken away for the winter, with everything attached to it.
It was actually a rack full of bikes, with one surgically removed (mine) and only the lock left behind, a medium cable obviously cut with some tools. I don't know how they took it away, but the cop who took the report guessed it was someone taking a joyride home eg. cable cutters in the backpack, and not some flatbed operation at all, because other junky bikes were left behind and they are not even locked. Mine probably was the one that did fit,
I am surprised because I thought I moved to a safer place, but even here, there are thieves apparently. I put the lock back out where kids could find it labeled "fuck you" because I was so pissed someone would honestly steal my bike from the rack, next to other bikes, but they did. Then that's why it was taken (because, it fit) and other bike-shaped objects were left behind. It did come from Target and it was the only bike they had, if I recall. It did need work, no doubt.
Maybe true that you need to know how to pick one that fits for yourself too, and once you know...? You can find it! This new one has 29" tires, larger than one I rode before that got stolen, and me too larger than when I rode it then, too.
I can't imagine buying a larger bike than this 29" behemoth. Or, bike-shaped object. I actually looked at close to 50 bikes, and picked one out after eliminating maybe eight before it, and tried to see the things that would make the price go up. They go low, I'm talking $79. I looked at the $79 and I had to look and try to convince myself that the welds were not as sound, and the frame wouldn't actually hold, but I didn't take it off the shelf either. Having found one already, that seemed to have fit!
And none of them fit you, had even marginally decent components, or were assembled by competent people. You got what you paid for. You are only fooling yourself if you think you'll do better with a different BSO from WalMart.
WalMart BSOs are one-size-fits-none, without exception. They are most often sized for people who are 4'11" with unusual length femurs and very short arms. There is no such thing as a WalMart BSO that correctly fits a fully grown adult. None has ever been made, and none ever will.
Look at it this way. WalMart sees no incentive in actually stocking BSOs of different sizes. It would be additional inventory to carry and it would require them teaching their employees how to address different sizes (even if they never teach them how to fit a customer, they still would need to know how to identify the size of a BSO). They just buy whatever bizarre BSO size their terrible manufacturers are making that month and send it out. They also know that the vast majority of their customers will treat the cheap BSOs like garbage and replace them when lost/stolen/destroyed, which perpetuates the business model.
They have bikes of different sizes, and their employees absolutely don't try to fit you with a bike, or profess to know what size is right for you, or address the different sizes one bit at all. There is a wall with like 50 bikes, and I got dirty looks when I asked one employee to help take a bike down off the shelf that I liked, and tighten up some things that were obviously loose and wrong with the individual bike itself. And they don't even try to sell you or send you home with a wrench, I remember when bike shaped objects were sold to kids of when I were kids era, all came with tools that you could use to take them down to bits and bolts. Yet these are billed as 'pre-assembled' when it's really just un-boxed and put together halfassedly by some part-time asshole who really works at Wal-Mart - what a joke! I would rather get a box of parts to be perfectly honest, but it seems that's not an option anymore.