Aww man. Don't quit.
DMC1 is awesome as hell. However if you're playing on Normal (which you should, easy is too easy) you'll be forced to play Hard on your next cycle. That's when the bosses (particularly Nightmare 3) truly starts kicking your ass.
And DMC2 isn't as bad as people make it sound to be. Most people make it seem almost as horrible as Superman 64 which it's not. Its bad when compared to the rest of the DMC series. Still a 6.5 game I'd say.
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Rock n' Roll and Glam Metal... It never died