In my recent experience this has changed drastically. Amazon was on average the cheapest, fastest online marketplace I'd used, and any issues were resolved within an hour.

Now I'm still waiting for a product I ordered 3 months ago. The only option I have is contacting the seller - who doesn't respond. I wrote a review about the experience, which then got promptly removed.

More recently I've ordered a few things from multiple places, the one outstanding delivery is from Amazon, and now almost a week late. It'll probably be the last one; their obvious lack of interest regarding fake reviews, review resetting and obfuscation, misleading pricing, counterfeit products and the constantly shrinking number of quality products have taken a toll. More often than not products are shipped from China, making it a worse choice than many local competitors who may ask higher prices for delivery but at least ship in two days instead of two weeks, have a phone support hotline and a reason to care.

Very slowly but steadily the reasons I started using Amazon's platform eroded away until it became more or less a more approachable middleman for aliexpress dropshippers.