A startup being able to spend 400k/month on AWS should also be able to employ somebody to keep an eye on the AWS cost and look for possible optimizations. If that's not the case I wouldn't blame AWS for the spent money.
No blame was on AWS. The TAMs tried to help fix things but no one was listening. Many times I was the only person meeting the 2-3 TAMs we had on the account.
I have many stories about this startup. The idea is great. If the startup succeeds it will be in spite of how its being managed technically
I have many stories about this startup. The idea is great. If the startup succeeds it will be in spite of how its being managed technically