Asking manager a release?

Need guidance from fellow experienced folks or who have done this before. What are the proper reasons to ask for a release.

My reasons:

• work is too hectic and repetitive and no growth technically (mostly support and maintenance once in a blue moon some dev sort of work).

• Client is mismanaged they dont know what work is important and come with multiple deadlines even before prod day.

• No proper KT is given when assigning a new task.

• In the name of agile its kanban board and not jira (given a sprint task to be finished in a day or two and new tickets pulled in between).

• Manager swaps ticket often in between sprint.

• Manager is mostly away even on standups or client calls so we manage faking they worked and we manage in behind scenes.

• Due to too many upcoming requests in tight deadlines from last 3 months wlb is miserable and have worked two weeks without an off once and night shift charges given is 220 only per day.

Now I need your all guidance on what can be a better approach or how to improvise