You can create separate environments with one or multiple Kubernetes clusters. You can create a Kubernetes infrastructure for AWS in 15mins from the UI and you can also connect your existing Kubernetes cluster.
Deployment of services and monitoring through integrated dashboard, you can view and monitor deployments, pod logs etc.
There is no vendor lock-in, all resources created on your AWS account are done in a cloud-native way so you can continue operate the infrastructure without Microtica if you would like to do so.
Support for Kubernetes deployments targeting differently labeled cloud environments is in our roadmap and will be available soon.
Want to look at Argo
Pain is relative, the least painful setup depends on information beyond what you have posted this far.