I know people do not like the camera in Ninja Gaiden, and it was actually better in Ninja Gaiden than Ninja Gaiden 2 simply because most of the fights in the first game were in wide open arenas instead of tight corridors like the second game, but I've seriously never had a problem with the camera in the game. Also, you got stuck at the bossfight in the sewers, right? The silvery face snake thing, right?
It's too bad you gave up so early, you'd have loved the second half of the game. Naked women covered in blood, fighting minotaurs and wolfmen in hell, demons raining fire down on you, rivers of blood, blood raining from the skies, I mean it's one of the most metal fucking games there is, and I'm surprised you gave up so soon!