Deleting from SharePoint Online

[coxygt]

I have a real bug bear with SPO, when trying to delete content, retention wise, a site will be added to the exclusion list so no holds connected.  Why is it that when you try to delete content, select say 400 items, it then comes up with xxx items were not deleted every time?

Surely there has to be an easy way to delete content from within SPO?

[#2]

I think this is happening because of the built-in paging functionality in the lists. When you select all items, only items visible on the page are selected (100 items). I agree this isn´t very user friendly.