A while back (2017, so some things were different), tried playing a start as a Byzantine Emperor (forget which, likely 769 start). Did okay in terms of external power, but was having all kinds of hell wrangling vassals (I'd done some pretty successful big playthroughs by that point, but most had started very small and built up instead of having an established powerful vassal base. I was also pretty new to Conclave and WoL at the time). A random one-county count, with no apparent motivation- very positive opinion of me, no claims, no close relatives had claims, not lunatic, etc, but very fond of the Intrigue focus- abducted me. Refused to accept ransom, so the kind of absurd situation of governing from my vassal's vassal's dungeon persisted for two years... until he decided to castrate me (which auto-released). Didn't affect succession- I had 4 sons already anyway- so it's not like he got anything out of it. Shockingly, the game thought it tyrannous for me to imprison him in turn. I decided "you want to see a tyrant, I'll show you a tyrant", and set out to imprison and castrate every single male character of the Byzantine culture group not of my dynasty in the realm. Once I'd gotten most of them (took decades), I culture-changed to Italian and murdered the remainder. This was not exactly ideal for the aforementioned realm stability, but I had stopped caring.
I still usually turn off AI Intrigue on most games.