Same in the previous company I worked for. All in one account, spending millions of dolards on it, terrible architecture. From the top of my head: Unecessary peerings everywhere, bad subnet configuration that provoked network conflicts in certain cases, no autoscaling, IAM access based exclusively on keys, no VPN etc And if that wasn't enough, everything was "done" with one of the most terrible examples of "automation" I've ever seen in my whole life: A huge Terraform mono repo with hundreds of files with hundreds of duplicated resource calls (because they didn't even use modules). It took them at least a week for just adding a simple IAM user without breaking anything else and the CD would take hours to finish. An absolute nightmare. As no one else in the company had experience with the cloud, the team managing all I mention was threated as some kind of supreme elite as everyone else though they were doing a great job. Beyond me.