I'm probably a terrible person but my husband's ex has been difficult in the past to say the least. We now have an amicable-ish relationship but she has been very nasty and disrespectful toward me in the past.
She is now with a partner who has children and lo and behold, is having issues with his ex being unreasonable (which she shares with us at pick up/drop off as she likes to share everything).
AIBU to not really feel any sympathy at all and just think... well... karma. She doesn't see it but she's being treated exactly the way she treated me!