Are those co-mingling issues actually resolved now? I still avoid purchasing anything on Amazon where receiving a counterfeit or slightly not-as-described item

Are those co-mingling issues actually resolved now? I still avoid purchasing anything on Amazon where receiving a counterfeit or slightly not-as-described item would be consequential. I haven't personally had a bad experience, but have read enough anecdotes and reviews about it over the past year or two that it has strongly shaped my Amazon purchasing habits.