I"ve been buying on Ali for several years, { hundreds of items, thousands of dollars} the odd time it went wrong, However the last 6 month's there; s more not arriving as there is arriving, buyers ALWAYS looses the dispute unless seller agrees to refund, which is usually not the case.
Even many sellers with good reviews have gone bad,, once a dispute is opened you can not post feedback anymore, so you will only see the tip of the iceberg in the negative feedback.
So far shipping using more expensive sources are still arriving { ups, ems, dhl etc}, china post and alikes china airmail, half of shipments do not make it to Canada
Added info, i found out several sellers with very good feedback use the blacklist or some kind of a different button, to blacklist a buyer as soon as there is any kind of problem, so you cannot put any negative feedback on their store, this way they manipulate the rating score of their store.