100% agreed. This is what bothered me about St Therese of Lisieux and her book The Story of a Soul, which she wrote it uder obedience to her confessor. It opens with her bragging about what a beautiful child she was. How can these be the words of a saint?
I recall nothing along those lines in her Autobiography. I'm fairly certain you're thinking of how her SISTERS (as in blood sisters) described her, which is often thrown in as a prologue to the actual
Story of a Soul. I believe Pauline in particular went out of her way to remark about it, and I also recall those comments. She in fact help compile "Story of a Soul".
EDIT: I just skimmed the early parts of it and asked for AI to find anything in there about her own beautify, and it couldn't find anything of note.