Most of the time, choosing a partner involves accepting the in-laws as well.
It is no secret that a lot of people have problems with the family of their significant other, whether that stems from jealousy, a need for control, or simply having very different values. Families are tough at the best of times, and making it work with one that you weren’t even born into can be an extra struggle. Sometimes, there is just too much potential for arguments for there to ever be a reasonable relationship.
At the same time, those who have issues with in-laws have to tread carefully in their response to them. The risk of upsetting their partner or facing some kind of retaliation from their supposed chosen family can be too high. Still, when years of tension have built up, many feel like there is no choice but to take action and stand up for themselves. Entitled people are unpleasant no matter where you encounter them, and it is only natural to feel like they should face consequences for their actions.