Their models suck.
We are still colder than the Middle Ages Warming Period, which was a natural warming cycle, which they tried to refute as a localized phenomena but failed, since it was proven to be global. They cannot explain nature, yet they can explain Co2?
We are within natural variation.
When you have to omit data or generate completely false experienced data, you don’t have a model. You have nothing more than an over-blown curve-fitting equation built on useless data inputs which outputs future data in the range desired.