Good on you for taking it like a champ!
I know it's hard to pour time and effort and part of your soul into a project only for a guy who spent a few minutes playing through it to disparage all that. I try to temper my criticism with constructive advice, but I know it's hard. It's great you can take this in the spirit it's intended.
Don't worry about your voice quality. Maybe you can borrow a mic from somewhere so the sound is ok, and everyone knows it's for a game jam. Alternatively, just have someone with a few minutes to spare voice act the few lines you have, shouldn't take more than 20 min. I'm sure reddit would help you in a heartbeat.
Thank you for replying, and thanks for participating in the jam. You tried something bold, something with a message perhaps, and that ambition is to be lauded. I hope we'll see you next year, and good luck!