as an engineer at instacart, it's very disheartening for me to see the top-rated comment on HN is "I can’t wait for instacart to go out of business."
even if we did not provide value to you (which i apologize for -- it is a priority of ours to improve the replacement experience in particular as it is very frustrating to customers), i am not sure why that implies that we do not provide a valuable service for others and why you would wish ill on us.
perhaps it is because you think of us as an overall unscrupulous company ("shady fees", "mark up everything you buy"), which i would contest -- we strive for transparency when possible (see [1] for screenshots around how we describe the pricing of our service). but the larger point remains -- why do you think that there can only be one victor here, and that is has to be amazon? (or "amazing" as you put it).
right now, amazon is very explicitly coming for the grocery industry -- an $800+ billion industry that is almost 100% offline -- and we are attempting to be one of the (hopefully many) independent companies that enables it online. grocery companies have built amazing fulfillment pipelines and relationships with both farms & customers that we are building a front-end and logistics system for.
anyways, i do not speak for instacart as a company, just for myself as an employee who usually enjoys HN.
[1] https://imgur.com/a/j47ls