Of course not, not consciously, but look around, you see people with very low self esteem laying in the gutter all over town. Imagine that what they have bad, you have as a mild case. We all feel like the worst in the world but that is a feeling we have that is neither accurate or conceivably logically possible, but if you were to become conscious of that feeling you would feel it as if it were maximally true. The expression of the feeling, how badly it fucks up our lives, varies from person to person, and from life experience to life experience. It's what breaks soldiers on the battle field. They get in touch with what they feel because the horror they see matches their experience of what happened to them in childhood. Give a successful, say psychotherapist, enough psychotherapy and enough cause to force him to feel, and he will also discover the truth of what I say.
I do OK in life, not a basket case, just a regular nobody, but I know that's how I feel because I have felt it. And was it ever a surprise, although I was also told it was true of me and I didn't believe it, not really. Still can't believe it. You only really know it when you're feeling it. I probably spent an hour or so sobbing, I had no idea I felt so bad, I had no idea, no idea at all.
Anyway, I understand your doubt, trust me.
PS: People can feel all sorts of things that are not true but what we feel is our truth because it is what we feel.