When you put it that way, I completely understand what you're saying. I have never experienced anything remotely close to that at the Walmart I shop at. It's not "new" by any means, but it's a supercenter. If my Walmart was a shopping "experience" as you've described above, then yes, I would probably find another store to shop in, and maybe it would be worth it to spend more $. Especially if I literally felt unsafe.
I also have to mention that when I typically shop I do NOT go during the "normal" hours where everyone and their brother is in the store either. I know how packed stores are on the weekends during what I would call "normal" hours. I typically do my shopping on my flex days (I work a flex work schedule) at 10am on either Thurs or Fridays, or, if I have to go on the weekend I'm there no later than 6am. The shelves are nice and stocked, I don't have anyone "in my way" when I'm shopping, etc. I know where everything is too so I have no issues there.
I don't buy clothing or anything there (except for random t-shirts, undies, socks) so I can't speak to the quality...however for the price I wouldn't expect much.
I do get what you're saying though...if my store felt unsafe, yes, I'd find another store.
I as in a Walmart outside Phoenix that was beautiful. Lots of aisle space, clean, well lit, seemed well stocked. My wal mart isn't like that. If it was, I might go there once in a while. It crowded, dirty, nothing is set up to look like you would want it.
And my suburban Walmart is way better than the one by my former work. That one doesn't feel SAFE.