Then you aren't using agile. Or not correctly at least.
We hear this all the time when agile projects fail. What makes you think that the success of other agile projects is due to agile?
One of the most important concepts of agile is to identify problems in the process and eliminate them.
If JIRA is slowing the dev team down, that should be identified in a retrospective & addressed.
Also, a 6 hour sprint planning for 1 week sprints is excessive. The "out of the box" number is 2 hours/week.
Finally, 1 week sprints are quite fast. Typically they should be used for prototyping or by a startup. In either of these cases, the planning "overhead' is usually minimized as everyone should already have a pretty clear idea what is being built.
If everyone has a pretty clear idea of what is getting built, why would you need an agile process?