Personal Statement Medicine Self Criticism

So basically in my personal statement I have a section about a first aid scenario I was in and how I acted and what skills I showed and how they are similar to what a doctor would need in other contexts. And then I say what I didn’t do that a doctor would do and how this shows a lack of certain skills under pressure and how these are important to a doctor and what I am doing/will do to improve these “weaknesses”. Where do you think the balance between Critical reflection and showing the best of myself lies? Is a very critical section with 1positive fine or should it be mainly positive? Also is this a good thing to write on a medicine ps? Thanks for any help