Ali does have some reputable stores, in Australia at least I trust Ali over eBay… eBay is a mess here, I have used it once in 18months.
Well, eBay also has its “buyer protection” scheme. I only buy stuff that is covered by that.
But, yes, in general, I also have the impression that there are more problematic transactions on eBay than on Aliexpress.
However, based on those protections, I recommend both for buy stuff.