End user reports list issue

Hey guys,

One of my end-user has been complaining that he has access to too many reports, so I was wondering if is there a way to check which reports a report user has access to? 

Below is just screenshot of the list of reports on the 'shared with me' option in the service. Ideally, mylsef as the admin, should be able to remove his access from reports he doesn't need to.

Many thanks!