Experiencing same slow behavior. In my case few parallel jobs are running quite fast and fine.
However, if I need to launch more than 10 parallel jobs it will lead to 10 Pods/containers creation, which takes more than 2 minutes to create Pods and containers.
At the same time awx_task container memory usage goes to the sky up to 8Gb, server is lagging.
Sometimes jobs are going in Error state with different reasons like: