Feedback is not part of the numbers that Ebay uses to evaluate seller on anymore. They stopped doing that a few years back, so your negative FB has nothing to do with you losing your TRS status.
Go look at your Seller Dashboard, that is what will tell you why you lost your status. This is something you should review at the very least once a week. Ebay evaluates sellers on the 20th of each month to be effective the 1st of the following month.
mam98031 • Volunteer Community Member • Buyer/Seller since 1999