I remember that part in Guardians, made me think of this as well. How you can't be 100% of much, real absolutes are hard to come by ;) in depends on what we're talking about.
Also there is the action, where someone was 100% a dick, and then afterwards they aren't, so they are being a dick but then stop. If their persistent behavior is to be a dick, then they are largely a dick even when they aren't directly being a dick. Persistence and repeatability isn't just for the scientific method, but for discerning truth and probability as well. Someone can be dick most of the time, or some of the time. Or, truly they are always a dick because that's what they choose as their modality of consciousness.
But who is truly a dick all the time, maybe 90%? LOL. People can be pretty damn evil, but no one is pure evil at all times. It's not liek every single action can be evil or dickery, but a high probability of continued behavior based on past behavior can signal vigilance and being ready for things.
Someone may not always be bad, but a reputation of being bad will have many people avoid them as they don't want bad things in their life. They aren't 100% bad, but behavior reflects upon character and people avoid those who can harm them. Being a dick, although not 100% of the time, can still get you a rep of being a 100% dick because you are most of the time. I just wanted to blab about the nuance of how someone can be called a "total" or "100%" something, not as a literal description, but as a general representation of their behavior that has been garnered through repeatability and persistence of their behavior.
That's the double edged sword of absolutes.
Once someone has a reputation, they can do almost anything and people will still consider them based on their previous reputation.
Yes it can fail to apply new behavior as well. People can change. We can stop doing what we formerly did. That's when someone is no longer a dick lol. They don't want to be, so they aren't anymore, at least not intentionally, maybe some slip ups hehe. Sometimes people don't want to change, and other times we do. But to trust someone again, we need their demonstration of a persistence and repeatability to their changed behavior.
Reputations blind both ways indeed, to focus on the bad rep and ignore the change towards being better after, and focusing on the good rep and ignoring the bad someone is doing.