Religious people often display the basic set of OCD (obsessive compulsive disorder) behavior that is characteristic of very sick schizoid personalities.

Without Musar [the Ethics of the Torah], religious people display the basic set of OCD (obsessive compulsive disorder) behavior that is characteristic of very sick schizoid personalities. That is what is the top of the list with obsessive compulsive disorder? Obsession with bodily cleanliness, food preparation, obsession with holy places and sexual obsessions.  When people are religious, but without Musar, they become infected with  schizoid personality traits. They get obsessed with mikveh, with extra restrictions on food preparation that have nothing to do with Torah, they get obsessed with graves of tzadikim (and even graves of not tzadikim) and sexual obsessions e.g. with zniut and the like.
And they think their obsessions with these things makes them tzadikim, and they expect to get paid for being tzadikim. What got me fed up with them is after they spend all their time and effort on their obsessions (which have nothing to do with Torah), they have no time or energy left to be decent human beings.

I also found their idol worship highly annoying, [That is worship of their so called tzadikim.]

The word "Musar" refeers to books of moral principles written mainly during the Middle Ages, but also refers to one book written later,- the Mesilaat Yesharim by Luzato. That is the strict meaning. But in a more loose sense,it refers even to later books on ethics, even and including books wriiten by the diciples of Rav Israel Salanter