Yep, you found your preferred genre
and you're a shoe-in for DnB. The synths sound great, the drums sound awesome, and everything fits. I especially like that dropping effect you did.
My main suggestion is to add melody. I know you don't feel comfortable in that territory, but you have to take the risk. Melody does add richness to a song.
Other than that, I have no other real complaints. Nice song, it definitely does sound like a boss battle.