My original issues with Walmart may be long past their time and prime to complain. Originally my dislike and rejection from shopping and supporting Walmart had more to do with how poorly (at the time) they were treating merchants, more specifically someone I knew. Their approach to bullying smaller businesses that sell through them and basically treating them like garage as they tossed around their collective weight and buying power didn't sit well so i decided to no longer support them. I realize Walmart isn't alone in this type of behavior nor am I trying to convert anyone here in forgoing their shopping at Walmart; it was just more personal. Since giving up purchasing anything from Walmart, it's just been a thing that hasn't been a big deal to continue doing so I see no real reason to go back.
I like Costco as well but we don't have many close by my home. There is one near my work (16 miles or so away) that I should probably start using, I just haven't made it a priority.