The bass in metal is the glue between the bottom end of the drums, especially the kick, and the mids of the guitars. Distorted guitars don’t glue well with an unmodified bass tone, it needs its own distortion, applied just right.
The standard of processing metal bass is to split it into three parallel tracks based on frequency, and treat those three tracks differently. When they are merged back together, they will make the perfect bass tone that glues with your guitars and with your drums. This video teaches you how!
Here’s the track template from the video. Unless you have the exact same plugins installed as me, it probably won’t work without a bit of modification.