Really. It's not what we promote it to be. The complication, the basket case moments.. yes we have them. Really though this self-depricating talk is a diversion. Not a very good one though..
It's like trying to hide something in plain sight but minimizing it by making light of it (speaking self-depricatingly). When we make light of it, it doesn't feel as bad as it actually is.
What is 'it', you might wonder? Exactly what Lady Shiori said. It's fear. At least, in my case it's fear.
I'm completely afraid I'll never find the her. So why try looking for her if I'm not confident the girl I'm currently interested in is really the one I'll wind up with? If I give it a shot and it doesn't work out, I've hurt someone and further reinforced the idea that I'm no good at realationships, I'll never find someone to settle down with, my fickle heart can't be trusted... and there you get the snow ball effect.
I don't think female INFJs are different from male INFJs in this respect. But I don't know any female INFJs that talk self-depricatingly about themselves, looking for positive reinforcement in the form of a compliment.
Really, the male INFJs, myself included, need to accept that they're imperfect, will never be able to get it 'right', and own it.. but they should not take responsibility for the actions and reactions of others in a relationship. I think this would free us up to being a little more bold, courageous, and strong for our ladies.