No you haven't. Just gets a little frustrating at times when people blow off your advice and try things that we all know are counter-productive.
So use your "Dad rule" and modify it. Will my actions help me get closer to my goal or not? Try it out and see if it works, if it works keep it, if not try something new. It helps to have a open mind to try new and difficult things.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.