Well now we got in to the stuff I hopelessly suck at. I have literally no idea what the two comments before me said. Except about the drum samples. The toms are from some FL Studio's own drum pack and the rest are from Vengeange Electroshock vol. 1.
But anyway, could you tell me the exact parts where the bass sounds odd? I just tried to replicate everything as best as I could. I don't consider myself a musician and I've never had any sort of musical education and my knowledge of chords, progressions, scales and everything like that is completely nonexistent.