First off, rock and metal kinds of music heavily rely on live performances. In fact, I would say that it is probably the most important element of the genre. You are using VST plugins which will take a considerable amount of effort to make them sound real. They will probably get you 80% of the way there at the absolute best.
I'm far from an expert with mixing, but when your bass guitar is overwhelmed by the rhythm, that's almost always because your rhythm guitars are too loud in the same bass frequencies. I always find this to be a real bitch when the song has low-tuned guitars. Basically, find where the bass guitar and rhythms are peaking, and cut some of the overlapping frequencies in the guitar.