In just two lines, the speaker sizes herself up and lands somewhere uncomfortable. She calls herself "a mess of good genetics," which is a odd, half-proud and half-defeated way to put it. The "good genetics" suggest she has real strengths, maybe talent, looks, or intelligence, but calling herself a "mess" means she can't feel them or use them. What she was born with and how she actually feels don't match up.
The second line shifts the blame outward. She is "caught up in a bad situation," as though she's been snared by circumstances rather than having made a clear mistake. The semicolon links the two lines, so the situation seems to be what turns the good material into a mess.
That tension is what the title, "Self doubt," points to. The mood is quiet, tired, and a little trapped. There's no drama or shouting, just a flat, honest admission that potential doesn't always feel like much when life is going badly.