Those sellers know perfectly how to play the complaint systems of the platforms, and it's destroying the customer experience.
When I want cheap crap, I now buy it where I know it's cheap crap, and when I want quality, I preferably buy it directly from the manufacturer, or from a renowned dealer.
If you are going to get questionable Chinese stuff, you might as well skip the middleman and get it from AliExpress, albeit with very slow shipping.
On the other hand, Ebay (and I presume Amazon, I never use them) tends to buy cheap stuff off of Aliexpress, mark it up and resell it, sometimes also faking the brand.
I'm not sure how much is deliberate dishonesty, but there sure is a lack of truth. Product titles are often a mishmash of words copy-pasted in and half irrelevant/misleading, making searching for some things completely impossible. Sellers often use pictures of other companies' products (sometimes multiple different ones), and contradictory specs are not uncommon. They often don't have sufficient English to understand and answer questions trying to clarify. I have rarely been disappointed, but my expectations are always pretty low.
At least that's the impression I have gotten. I'm willing to accept that others may have had really bad experiences there.
The honesty of Aliexpress sellers varies. A "blanket hoodie" I bought doesn't even go to my hips.
Many AE sellers, when confronted with insufficient or wrong items delivered, will offer coupons or discounts rather than replacements or refunds. You have to insist on what you want because interacting with Chinese businesses often requires assertiveness.
I'm a diamond-level buyer, so AE pretty much sides with me 99% of the time and since I don't make frivolous disputes.
I'm dealing with an Aliexpress seller that sent me the wrong thing and it's basically not worth shipping back to China. I'm trying to get a few dollars from the seller but they're slippery as hell, want to privately paypal me the money etc. Never again!