Walmart has the same exact marketplace sellers and the same exact problems as Amazon (unless perhaps you go to their brick and mortar stores). The only solution is to shop for only brands that are known to be good and have a reputation to protect, which of course doesn't scale very well beyond our personal preferences.
While they make it a pain and constantly reset it, it is still possible to set the filter for Walmart only on their website. I'm not sure shopping for known good brands works since counterfeits are so prevalent and many third party sellers on walmart seem to just be running an Amazon reshipping service.
I'll go to one of their physical locations if I want something that plugs into the wall. It's likely to be actually what it says on the box, if I do that.
