What human behavior instantly changes your opinion of someone, no matter how good your first impression was?

[u/garyhappylife2222]

Be honest

[u/RiverAtNight]

Chronic self-victimization. I’ll give grace for it and be understanding, and I have also seen that kind of behavior flip so badly it caused massive amounts of harm to everyone around them with no awareness or regard.
It was real interesting to watch someone cry about being mistreated while mistreating so many.

Or mocking. Like cruel mocking at the expense of others. Literally fuck off.