I shouldn't have read about the film. I overthought it.
I am pretty sure you're not ugly inside, even if you feel crippled. You are here, concerned about how you are, the way you act, the way you seem to others. Really hideous people don't think about that. Yeah, they think about themselves, and so do you ('n' me!) but not in the same way. Hideous people are not trapped within themselves... they are scouting the territory around them, for people to use for their own ends. They are not lost in thought... just conniving.
There's nothing about you that seems ugly like that.
Maybe you're right about being very different. Maybe you can't do what "everybody else" does. I don't know whether this is true or not... I know it's true of me. A lot of things that normal people do with ease, I struggle with or cannot do at all. We're better adapted for different things though.... not inferior. Not necessarily so. The world is full of accidents. Your particular set of traits is no more malformed than anybody else's.
If you feel that there are certain things you'd like to do, but cannot... maybe you can do those things by another means than the standard way.
If you feel that people are expecting things of you that you can't deliver, don't fret. They're wrong to ask it of you. Nobody knows what you are. You come closer than anybody else to knowing that, and not even you can know it fully. Nobody knows what motivations you have, what pressures you're under. They can judge you all day and night, but that doesn't make them right.
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The machine does not isolate man from the great problems of nature but plunges him more deeply into them. -Antoine de Saint Exupéry