I am more offended by the continual use of X-mas instead of CHRIST-mas. Yes, I know what the X stands for, but I still don’t like abbreviating the Lord’s name.
You're free to not do so if you don't like it.
The earliest Christians used the Chi, as well as the paired Chi-Rho symbols that the Church still uses to this day.
I agree that a mundane X doesn’t really do it for me either. It would be nice if some folks would actually use a real Chi or the Chi-Rho.