I'm approaching 30 and feel like a failure, a loser, and too old to turn my life around. At the same time, I feel that my problems are trivial and that I shouldn't be posting here.
Life is very hard right now, you absolutely should be posting here because when you speak up about how you are hurting you make the rest of us who may be in similar situations hurting feel less alone even if we can't give you any advice to magically solve the problem and vice versa.
Then again, advice doesn't have to be magic or novel to be helpful, sometimes just hearing it repeated over and over again is what counts.