Garble had complete control and sway over all the other “teen” dragons. This continued in Gauntlet of fire and in Shadow Play. The idea of him “actually being sweet” is total hogwash because we saw multiple moments where he COULD have shown SOME sympathetic values or any manner of kindness, but he doesn’t have any.
He wants power, he demands others follow his commands, and when something “nice” happens around him, he destroys it.
He wants power, he demands others follow his commands, and when something “nice” happens around him, he destroys it.