What's something that a character has done that you'll never forgive?

I have a few.

Cas: breaking Sam's wall

Dean: tricking Sam into letting Gadreel possess him. Telling Sam he should've died istead of Charlie.

Sam: not looking for Dean. Leaving kevin with Crowley and ignoring his calls.

These are pretty popular tho so if you have something else i would like to know!

I was trying to think something about bobby but he's perfect to my eyes💀