Utterly Mad

Honestly, maybe it just is what it is.
It's not worse for being similar to WH40k, it just is its own thing.

If you want it to be less WH40K-esque though then you'd probably have to change something significant about the Orcs, how they work socially or their level of technological advancement or intelligence.
For example something that is very rarely seen is incredibly intelligent Orcs, as smart as humans, maybe even smarter, yet still with the physical build of a typical Orc.
Using their teeth as currency is the first thing that screamed WH40K to me, maybe their form of trade and bartering is more physical based, where they fight one another, one on one, for an object they want, which ever one fought better, not just the winner, takes the object and if fighting is not appropriate then they'll use things like screws and bolts as currency since they're always in such high demand.
Another thing is most Orcs 'tower' over humans at around 7ft tall, however if something was really going to tower over me I'd image it to be about 9ft tall, I mean it'd be absolutely huge, fucking terrifying but make a massive target, cause their ships to be quite large and make it somewhat difficult for them to crawl through the ships of other races, but they just pull them apart anyway.

Suggestion to change the term racist to xenophobic, it may fit better if they're hostile to any race but their own purely because they think they're better.