You certainly have a talent for metal production! I don’t know the tropes of Doom music to comment on, but some things that I did notice that I thought were really cool were the EQ shifts in the master that felt like we were sliding in and out of reality, the buzzy synth lead, the sidechaining to allow the bass to come through, and the lateral reverb that makes the echoes seem like they are moving and therefore implies motion. Great work on this and thank you for sharing!