It sounds overly compressed/limited. If you have a compressor/limiter on the master, I would try disabling that and mixing down again. I'd also try to cleanup your subbass, separating the mid/highs (200hz+) from the low (like 150hz and below) and mono'ing the low with no distortion. Overall, work on getting more clarity/power from your instruments (proper EQ'ing and stereo placement) and lessen the compression.