Sure, but some of the dnb and jungle I've heard from the 00s does melancholy better, imo. Breakcore, that tends to be frantic, just sounds like it's trying too hard(?), or makes me want to shoot stuff ala Ultrakill, but I can also see it as a metaphor for breaking down, hence "breakcore".
But, eh. It could've been called, if insisting on a new label, breakneck or sum shit.