You should not blame seller for loss, which is completely beyond his control. You should just open a not received case and allow seller to deal with the situation.
“you people” We are members like you who try to help, we are not ebay, just unpaid members.
It is ebay who send reminders abut feedback, and that is within your control, you just edit your communication preferences to avoid these annoying messages.
Suggest you read this and go to General Preferences at the bottom.https://commspreferences.ebay.co.uk/commsprefs