Sounds both intimidating and goofy at the same time, you definitely nailed that "tough but not really" aspect! The industrial feel is fine, but some deviations from the main theme repeat one time too many. I'd cut some repetitions after 1:40 and 3:40.
You could also try to alternate the lead instrument with a 2nd one to add more variation (especially in the aforementioned parts).
Overall a lively, effective boss theme, well done dude!
The critique has been harsher than the norm IMO, but I'm also quite soft.