I know it sounds extreme, but I've had enough. They live some distance away so we tend to visit every couple of months, staying for about three days. The atmosphere is very unpleasant due to frequent rows, bickering and just general bad-temperedness.
Most of it is between either FIL and their adult, disabled son, who lives at home, or FIL and my husband (who can be rude and grumpy with them himself while he's there). Mostly I would say it's down to FIL's hot temper and constant grumpiness, but my husband doesn't help.
This Christmas was the worst visit ever, constant flare-ups over trivial disagreements. At one point MIL told my husband to fuck off - while our children, who are 5 and 7, were in the same room. I feel like saying "I'm not going back there, you can take them yourself from now on." Or maybe say I'll just go once a year. I think life's too short to spend much time in this kind of atmosphere.