If you know who Farla is, in 2005 or so she found me and my writing pretty irritating and extremely mediocre. I didn't exactly react in the most mature possible way, which probably didn't help. But once I grew out of that I started to respect her as a critic, so I deliberately posted one-shots when she was reviewing everything in the Pokémon category on FFN (fun fact: every one-shot I've written since 2006 or so was finished and posted because I wanted her to review them), and when I posted Curse, she actually quite liked it and only had a couple of minor niggles. Eventually she liked Butterfree, too. I've never felt as genuinely thrilled about praise as when it came from someone who'd vocally disliked my work before.
So, best-case scenario, this person who hates everything you write is just a critic with very high standards, in which case you should try to look past their tone, take their criticisms into consideration (given they make sense), and one day something you write may live up to their standards (or not; don't live to please one critic). But if it's just somebody who seems to have a hate-on for you personally for whatever reason and isn't giving useful critique of any sort, there's not much to do about it but shrug and be on your way. You can't please everyone; you have no obligation to "deal with" people who just don't like you.