eBay and Amazon Marketplace put the burden of proof of delivery on the seller instead of the buyer when the shipment is not protected with signature confirmation. Many AliExpress-style items are also listed on eBay and Amazon at similar prices, and I've mostly switched over after my bad experiences with AliExpress. AliExpress still has a different selection of items, so I haven't stopped using it completely.
E.g. I had obviously fake EEPROM chips delivered, they weren't even new (they contained data from the previous use!). I have opened a dispute, posted the evidence that the chips are relabeled fakes - and promptly got it rejected both first time and on appeal. The grunt handling it had absolutely no idea what my complaint was about, I have received my goods, so what more do I want?
Fortunately it was only a few euros worth so not big deal - I have opened the dispute mostly to point out that the seller is a fraudster, not to recover my 15€ or so back. Tough luck ...
Over the years I had more luck sorting complaints out on AliExpress directly with the sellers because they are afraid of losing their ratings and thus a large portion of business (people usually sort by price and then by ratings). The support staff is hopeless in these cases.
...which are made in China, probably in the same factories contracted by the original manufacturer. Aliexpress just lets you cut out the middleman.