Scrupulosity isn’t much of a problem anymore, because by and large, people have lost their sense of sin, and above all, their sense that some sins are so serious (objectively grave matter, sufficient reflection, full consent of the will) that they could rupture one’s relationship with Almighty God and deprive the soul of sanctifying grace. The problem these days is not of scrupulosity, but of what could be called (for want of a better term), the lack of scrupulosity. If people had a finely honed sense of sin, they would constantly be on guard to ensure that they do not commit these sins. Nowadays, though, the reality of sin in people’s actual lives is sorely lacking. Many people engage in premarital sex, practice contraception, live together outside of marriage, and so on, and don’t give it a second thought. There are far more sins than just sins of the flesh, but as Our Lady of Fatima said, more souls go to hell for sins of the flesh than for any other reason.
All this said, scrupulosity remains a serious problem for some people. This can only be resolved by humble submission to a good, faithful, orthodox confessor, and where necessary, psychological counseling to address the obsessive-compulsive aspect of scrupulosity.