Have you ever tried to deceive yourself? Deceiving ourselves is always possible and I'm pretty sure most of us did it to ourselves. Do you consider yourself as traitor when you're not acting the right way for your own benefit?
The truth is most people are afraid to face reality and making some hard decisions, so they just do what they think will be easier knowing fully well that they are deceiving their self.
Most times we make hard choices for our own good but at times we just keep what is necessary aside, because of what is involved and do what will make us regret later.
I can't say I am a traitor to my self but sometimes I blame my self for taking wrong decisions.
Try and face the reality no matter what it may cost, thats life so stop deceiving your self.
Just as you said, it has already become a custom for some people to enjoy being a traitor to themselves and other by following or allowing what seems easy but actually the problem . Telling fat lies to get out of trouble and get others into trouble. When on the real sense they are just running in the helpless circles they create.
Personally, I had deceived myself with some decisions and indecisiveness which cause some kind had I know. The game changer is to tell oneself every simple truth, embrace it and see the joy it brings..
Funny enough, some don't even know when they are fatally undoing themselves, lying to yourself and not knowing it. I guess this is the worst self traitorship.