Is it normal that i get feistier as i get older?

Is it normal that the older i get, the more receptive i am to aggressiveness. One of the first things I observe when i am making a transaction with anyone, is if they get sassy with me. If they display sarcasm, discrimination, bias, racism on their own without any incentiive on my part. In other words, I am generally a docile meek girl, but experience throughout the years has taught me that people are sh!t for the most part. highly selfish wreckless loud tantrum throwing adults

yes I have worked retail customer service. I am alot more ready to be on the defensive easily. I have prepared comebacks for any given scenerio. what i will say, with the expectation that the person will be aggressive with me.

I am beginning to develop anti social tendencies. I generally prefer to keep to myself now from the gossip fueled co workers of mine. I walk chin up shoulders back with confidence, but ready for aggression for the most part.

I wasnt like this when i was younger, about 3 years ago i wasnt. I was more oblivious and carefree, but not aware of the aggression. Now thtat im older...i seem to be alot more angrier yet non chalant about the bullsh!t of other people.

Is this normal? anyone can relate to this experience?