Oh... I'm sorry man...
It must be hard, but honestly I thought the song quality was nice. You really shouldn't worry about your recording, its the meaning that counts, (well, scratch that, at least be able to stay on the same note) but it is true. I honestly think that the trolls should just leave you alone, this has got to be one of the hardest experiences in your life so far, and I want to thank you for sharing this song with everyone, not only does it help heal your pain, but it helps those out there who also have lost someone.