you broke into my house dude you aren’t gonna be praised

Of course not.

This kid has every right to be proud, in this situation we are nothing but animals and he did exactly the right thing.

So is it right to put deadly weapons into the hands of children?
What if he had killed the burglar? Good thing to have on the conscience of a child, right?

Don't get me wrong. I totally understand that in extreme situations people should defend themselves. But was this an extreme situation which justifies these actions?

What the child said is already deeply disturbing:

"I told him I was going to kill him if he didn't get out of my house," said Chris.

And why the fuck do children have access to weapons?

he grabbed a 9mm handgun

Then there is this:

The intruder made it out the front door, but that's when Chris started firing off bullets. As the intruder was about to jump a fence, Chris's 12th and final shot hit the bad guy in the leg.

( Citations from: https://www.wptv.com/news/national/chris-gaither-11-year-old-boy-shoots-intruder-who-cried-like-a-baby )

Intruder was outside, going away, and the kid started shooting.
The kid could've just ran away. Instead of trying to kill someone or getting themselves killed by such a behaviour.

No. The kid shouldn't be proud. Neither should anyone. That's just fucked up. And raising kids to become possibly killers is not making it better overall.
He can be lucky not to have killed that man and that he (the kid) didn't get seriously injured.

People can and should be better than this.