Their material pleasures, which includes public glorification, wealth, and having the prettiest girlfriend are very excessive and replace their spiritual and intellectual approaches. This happens mainly because they are irrational and are driven by their emotions. The worst part of all is that bad self-loved people not only hurt themselves but harm others as well.
Aristotle made a good case of self-love playing an essential role in friendship because he pointed out that if a self-loved man preserves his existence, uses his intellect, does what is good for himself, spends time with oneself, and shares with himself his own pleasures, pains, joys and losses, then he will have what it takes to love his friend as another self.
Moreover, Kant also had his own good and bad distinguishes of self-love. The good, which he calls self-esteem, is said to be a duty to one's self and is intrinsic to each human. This means that these self-lovers use an inner comparison of moral qualities towards the moral law. He compares himself with the moral law and asks questions like, as a human how can I live well? This person has respect for our humanity, which includes our reason and our will. They strive to become better and see themselves worthy of respect. There are three versions of a bad self-lover, according to Kant. Moral self-lovers pretty much love their own moral characteristics in a bad way. They fall in love with their perfections and believe to be a benefactor to mankind. The main problem with moral self-lovers is that they have empty wishes, which means that they don't live out the desires they say they do. Like Kant says, "Moral philautia, which gives a man a high opinion of himself in respect of his moral perfections, is detestable" (Kant 136). Arrogant self-lovers are unmerited and claim that they work. They suffer delusional self-sufficiency and don't depend on others. Lastly, moral egoistic lovers constantly compare themselves to others only to find superiority in the relationship to others.
