To remove the “download csv options”, clear the “allow viewers to copy data out of this view” toggle when sharing the view. They should still be able to copy/paste single cell values.
Thumbnails of images in attachments should show in the shared view, just as they appear in the user interface. Can you share a screen capture of what you see in the shared view versus the user interface? (If the forums won’t let you post a screen capture, you might need to participate in the community a little more first.)