If someone treats you bad, just remember that there is something wrong with them, not you. Normal people don't go around destroying other people. Meaning. If anyone misbehaves or treats you badly, it's not your fault; rather, it's that person's fault. Something is wrong with that person, and it's showing in their action toward you.
If you see anyone treating you badly, note that something is wrong with them. This is because good people don't destroy other people with bad behavior. Instead, they will respect other people's feelings. Don't dwell on it too much and make it disturb your daily life, thinking that something is wrong with you because people are treating you badly. People are supposed to be polite, humble, and helpful to one another.
Do not focus on anything negative that's happening around you. Know that anyone who does not keep a check on their behaviour and always treats you badly is not a good person; this can be seen in the way they treat people. You can not destroy other people and spoil their moods because that's not what you are supposed to be.