Thoughts:

- Sweet drum patterns you have here. They are my favourite part of the piece. The drum is my favourite instrument and so, well done on really nailing this. A bit of studio reverb might help them maybe?

- The sounds all need to be fatter. It sounds to me that the guitar is a default FL Slayer preset, which probably needs to be amped up with EQ, heavy amounts of distortion and a different cabinet. Right now, it sounds tinny and admittedly, is the go-to for those of us who don't have a better guitar setting to use. I wonder if Sytrus won't have something to layer behind Slayer for that added oomph.

- Do I hear BooBass or something? The bass is fine as far as I am aware. Also, it isn't clashing with that kick, so it's okay.

- It loops decently. It does remind me of one of the first rock loops I made on FL, albeit more complex than that, so it does evoke a bit of nostalgia for me.

- Technically your setup could class as heavy metal, because heavy metal is classed by the use of simply guitar / bass / drums. There is a heavy emphasis on space, which is what made it break from rock in the first place. Try imagining what it would sound like, in that new light, and work on your EQ and reverb accordingly.