Why should VCs get a 30-50% return on what they put in, but engineers don't get a 30-50% return on the salary they sacrificed to actually do the damn work of the startup?
I.e. On average, engineers get paid what they do because if they demand any more, another peer of equal caliber, on average, will take their job. VC's get paid, on average, what they do because no other VC will do it for less.
Unless you have some genuine superhuman value for justice , you'll be better off spending your energy learning how to work within the system versus being angry/complaining about it.