So I'm watching Pathfinder today and Commander Harkins IS kind of a dick. What is wrong with trying Reg's microwormhole idea? Hell, whats the matter with trying the GIANT wormhole idea? Their job is to try and contact Voyager, NOT TRYING just because you dont think it's a good idea seems pretty stupid.
So like most characters liike this, he's written to be a jerk and unreasonable just so the Hero can be redeemed in the end.