I find AWS ECS with fargate to be a nice middle ground. You still have to deal with IAM, networking, etc. but once you get that sorted it’s quite easy to auto-scale a container and make it highly available.

I’ve used kubernetes as well in the past and it certainly can do the job, but ECS is my go-to currently for a new project. Kubernetes may be better for more complex scenarios, but for a new project or startup I think having a need for kubernetes vs. something simpler like ECS would tend to indicate questionable architecture choices.