Things that make a person undesirable

 likely to want to be around someone who is rude or disrespectful.

Being self-centered or arrogant. People who are self-centered or arrogant often come across as narcissistic and uninterested in others. This can make them difficult to connect with and be around.

Being negative or complaining all the time. No one wants to be around someone who is always complaining and being negative. It can be draining and demoralizing.

Being dishonest or untrustworthy. Trust is essential in any relationship. If someone is dishonest or untrustworthy, it is difficult to build and maintain a relationship with them.

Being abusive or violent. Abuse of any kind is unacceptable and will make someone undesirable.

In addition to these general examples, there are also some specific things that can make a person undesirable in certain situations. For example, someone who is always late or who is constantly borrowing money is likely to be unpopular. Similarly, someone who is always talking about themselves or who is constantly interrupting others is also likely to be off-putting.

It is important to remember that everyone is different and what one person finds undesirable may not be the same for another person. However, the general examples listed above are some things that are likely to make a person undesirable to most people.