Some hopefully helpful advises to the feedback system (see also other issue handling systems like bugzilla, github's issues, stackoverflow.com):

• require people to log in to give feedback. (I guess some of the angry feedback will "disappear" by doing so.)
• filtering on status: Add an option to filter on the status of the case. open/closed/in progress/appropriateness etc and product: web/app etc.
• duplication: add an option to indicate duplication of issues. (Maybe also an AI-bot could help you there.)
• keep voting open until the case is closed (one vote per user?).
• add a commenting feature so that more information can be added to a case.
• verbal violence comments should be automatically deleted even written with asterisk etc. or the user should be alerted that it will be automatically deleted if he/she does not remove such wording. Maybe use an AI or just a word list?
• add an issue age limit (since last comment/vote or similar after you have looked at it) before automatic close, send a notice to those that has participated in the discussion, say - a week before to allow them to add a new comment with new information. Number of comments and age of last comment can give a better priority of the case.

These were the ones that popped into my head now.

Happy development.