I am sorry to hear about the PFOs. Writing applications is like a muscle that constantly needs flexing. I assure you that despite those PFOs, you would have improved your writing skills - and that’s the most important thing beyond those rejection emails.
Another thing is that if you genuinely aren’t interested in the contentious practices as much, then that’s fine. It just requires you to apply to more transactional-focused law firms, since showcasing that link would be easier given your broader interests and experiences. That said, early on in your career I don’t recommend throwing away exploring that side too (this is me talking beyond the application stage). When the time comes, you can choose to do more rotations in transactional law, but at least one in a contentious seat. I have spoken to many lawyers who have mentioned that their qualification options shocked them. However, it all boils down to personal preference on your part.
Back to the topic of discussion. If you’re comfortable, you could post your answers to why law and why X firm on the forum, and I could review them and provide feedback.