I am tired of seeing comments on people who like to sing on YouTube and share, but instead of giving them critism they say stuff like, "pls dnt sing ur genes wont allow it"

Please Don't Type.  You suck at spelling, so don't type.  You'll never improve, your genes won't allow it.

Just kidding, you can improve on typing, you're a typer because you do it. 

sing
siNG/
verb
gerund or present participle: singing
1.
make musical sounds with the voice, especially words with a set tune.
"Bella sang to the baby"
 

Everyone is a singer.  It doesn't matter how good you are, or how well you do it.  You're a singer.  Proper singing comes from practice and learning.  Look at a piano player, they don't start out knowing how to play piano, they learn how.  Your voice can be used as an instrument, and you just need to learn on how to play it.  Don't let these people say that they LOL'd hard because it was so out of tune get you down.

Everyone is a singer, even you! Forget the haters! Do you! :) If you do originals, sing them, don't be scared to show the public your work. <3