You're preaching to the choir.  Just last week I lectured a Southern Baptist friend on scrupulosity.  But you confuse an insistence on keeping the Church's rules, which is in itself a good thing, with excessive guilt about breaking them, or worse yet, regarding as sin that which is not sin.  If, in general, you don't think the Church's rules are a good thing but still call yourself Catholic, then you have a huge case of cognitive dissonance.  But then you're in numerous company here.