like water off a ducks back

So I have some acquired 3 ducks 2 Swedish blue ducks and one Pekin duck, with a deformed bill. Their names are Mrs. Featherby waddles, better than eggra and daffy duck yeah original huh, anyhow 

Have you ever heard the expression "like water off a ducks back, well this is usually an insult or criticism that doesn't really have any effect on the person being criticized. 

we are our own worst critics, it's us battling ourselves not you against her or him or whatever, we criticize everything we are, everything we do, every little flaw we see in ourselves. We are our own worst enemy also, but what is it that we are trying to do with our lives, is it to be one upping the other person, no that is not what life is about, trying to get ahead is great yes trying to live better happier lives, but if we continue to criticize ourselves based on what society tells us, who we are, how were supposed to dress, or how much we should weigh, and what we are supposed to do for a living to be successful.  The old adage your successful if you make a billion dollars, well that idea can and should be relished in my opinion. The most important part of being successful is that whatever we do, is it making us happy, do we enjoy it, yes some of us are stuck in a mundane job day to day that may not be fulfilling, but it is paying the bills, so there's that.