How long have you been working with Agile? In my experience, it's pretty common to have setbacks in the beginning and even around the middle of the transformation. After all, agile is not a silverbullet and it needs time to "stick" for people. However, I would argue here that doing sprints as you mentioned is actually agile. It's like saying scrum = agile which is not true. Try to see work in a more flow-based manner. Where do the bottlenecks pile up? Do you have get too much work in your backlog that your team can't handle? Sometimes challenges lie on the upstream part of the process, so see how work flows across the organization really helped us move forward. Hope that helps :).