There are definitely some places that I believe could be improved. I think you may have taken some of the advice too literally.

For example, is there a reason to say he’s “small” or “male”? The way you describe your character, event, and action should tell readers more of what the story is about.

Also being “bullied and called a freak by bullies” is a tautology. It doesn’t tell us anything extra about who is bullying him.

You can clean up your logline a bit, this will help its length. For example “the teenager” can be modified to “he”, which would also show he is male without using extra words to say so.

Based on your synopsis, I’m unsure if the action “must learn to stay invisible from the bullies to avoid getting hurt,” is accurate to your story. You may potentially need to re-consider or at least consider what he must do. Same with the event which triggers his actions, is it really due to him being bullied? That seems like it was the world he was already living in. At least to me it seems the event is him getting scared of his own reflection.

Good luck with writing and revising!
– Joshua L.