For the first five years or so that I was married, I tried to be a "team player" and in turn attempted to rationalize (and tolerate) the arrogant and selfish behavior of my then in-laws. Then I got off the team by verbally handing them their ass a few times. After that, my relationship with them could be categorized as "detente."
Which was just fine with me.
The downside was that it put a strain on my marriage. But there were many strains and that was just another log on the fire. Finally solved the problem with a trip to the attorney's office.