Beanstalk, while great when it came out, is not a great solution now. It was also never really meant for teams who run things at scale. It also got quite complicated because it just didn't expose a lot of knobs.
I think you'd find ECS or similar as easy to work with as k8s and all of them will be faster than beanstalk.
Beanstalk is ALWAYS purposefully slow, this is by design. It mimics how amazon deploys internally, slow and steady wins the race to safety. It also has some really bad issue if from from a bad deploy back to a broken app; eg you can wedge it pretty bad.
Anyway at this point I don't think Beanstalk is a fair thing to compare to. It's good you moved off.
I think you'd find ECS or similar as easy to work with as k8s and all of them will be faster than beanstalk.
Beanstalk is ALWAYS purposefully slow, this is by design. It mimics how amazon deploys internally, slow and steady wins the race to safety. It also has some really bad issue if from from a bad deploy back to a broken app; eg you can wedge it pretty bad.
Anyway at this point I don't think Beanstalk is a fair thing to compare to. It's good you moved off.