Not really sure how to feel about this one. Without editorializing, I would say that it was a decent enough story, although lacking in a strong, coherent plot or anything which amounted to tension. Stuff just happened, she suffered, then she died. The language was okay, but not special. The setting was too indistinct - as was the time period. The man accuses her of being a witch, yet she is tried by a judge - not an inquisitor or magistrate. That seemed odd. More specific detail would have helped quite a bit.
As for the subject matter, I just found it hard to sympathize with the character. She was a perennial sufferer and, at some point, that becomes a product of one's own making. I am reminded by a (paraphrased) statement I read in an apocryphal book a long time ago - I wish I could remember it better - but it was something about how there is nothing wrong with looking down upon wretches who live amongst plenty, clearly they simply lack the strength, intelligence, will or desire to aquire their portion of the bounty all around them. There is no lack of resources, only a lack of will.
In the same manner, her suicide felt more like a defeat than a victory. It didn't prove anything to anybody, and if she wanted to prove to herself that she "would not submit to them" she could have confessed, but not meant any of it. If you lie in order to get what you want (in this case freedom) I would not call that defeat or submission. I would, however, call burning yourself to death out of spite a defeat. So far as I could tell from the story, she could simply say "I'm sorry" and get set free - all the while, laughing her ass off about what fools they were for believing her.
There is a romance some people associate with suicide, but try as I might, I could not see anything romantic (or even horrific) about the ending. Someone who never cared about themself, kills themself. Ho hum.