Nah, they're epic. It's the rebels who constantly run with their tails between their legs.
And yet, when the Rebels are backed in to a corner and forced to turn and fight it is the Death Stars that don't walk away...
Tarkin was pants-on-head stupid and flush from crushing a Rebel attack of 200 X-Wings at the Battle of Despayre. Who cares about 30 fighters if 200 couldn't stop them?
But of course, plot required the Death Star to be destroyed. If the setting were a real-world simulation AND were Tarkin halfway competent and not in his place due to nepotism, the Death Star would have launched its several-thousand-strong TIE screen or just plain shot Yavin and then Yavin IV, and that would've been the game.
Makes for a **** hero movie tho.