Customising menus and removing buttons

Is it possible to customise menus and remove buttons like the ones highlighted in yellow in the attached. We know we can remove somethings via permissions however we are finding permissions not granular enough. Screens in attached are from v6 in our lab, running 5.5.3 in production.

Nothing directly attached to those buttons but the recommendation would be a user doesn’t have access to infra > clouds or compute unless they own the infra. That’s more than what a typical user needs.