FYI I moved your post (and your vote) to an existing thread for your prevent-task-deletion request.
You also included a request to prevent project deletions; I can only move your post to one other thread but you can add your prevent-project-deletion vote to an existing request on that topic here:
Believe me, I totally get your frustration at not having these capabilities. That said, we’re mostly volunteers here and we try to keep a positive tone wherever possible.