If you don’t like certain menus and their features to be used by subsite users in WordPress multisite install then you may easily disable them. For example: if you don’t want your subsite users to upload media then you can disable media library menu from dashboard. Doing this they won’t be seeing media library menu in their admin section and even if they try to get their they will be seeing an error message.
First of all you will need to install and activate Menus plugin. Then visit your network admin dashboard and configure menus settings as shown in the following image: