[neves]

As an user, this is what really annoys me:

Crazy sneaky complex billing in which they hit you for data movement within their own systems, double billing you and sometimes triple billing you. Billing footguns and traps are everywhere - you must be a deep expert to avoid them.

IAM - the hideously complex auth and access rules system - this was invented by Lucifer sitting on his burning throne in the ninth level of Hell as the worst possible torment for those who have been sent below for using AWS.