But then you don't really have ideals you can't live up to, because you have accepted that you never will reach them. You real ideals are tacit. Just because you haven't formulated these ideals for your self, doesn't mean they aren't there.
In reality I suspect that your real ideals fit your life exactly as you have it now, as do most people. We seem to love to judge others, and what better vantage point than ones own.
And if they don't fit your life as you have it now, then I believe the purpose is that you take pleasure in beating yourself up over your short-comings, but never to reach them. Since that would remove this dynamic.