I'm in NYC and it's the reverse. Amazon / Whole Foods is a nightmare for delivery. OK, workflow is I spend 30 minutes putting things in my cart. Sometimes as I click it says No Longer Available. Eventually I get to check out. No delivery slots available. I check back again a few hours later. Now most things have been autoremoved from my cart. Try again. Same result. Tried every few days for two weeks.
Instacart had same day delivery and a shopper that interacts with you on the app to ask about substitutions, using the automation of the app, and sometimes chat and pictures. Great luck with that.
The Amazon grocery shopping experience has been an absolute nightmare. I've stopped even bothering.