One underrated benefit of being in a relationship is how it can expand your social circle, but it also has the potential to be a huge downside as well. There is every chance that even the most well-meaning and caring of partners will be acquainted with people who bring very little positive things to your life or theirs.
While it is true that there is no obligation to get along amazingly with every individual that you meet, being exposed to those who have an issue with you can be a real headache. It often ends up having bigger consequences than just plain old annoyance. Some people revel in provoking others and then making them look like the bad guy, and if you are on the receiving end of this, it can be insufferable. When such an individual is tied to the social circle of your partner, it can only make things more complicated.