The end. No anger at you or your boss. It's an incompatibility.
I understand why some companies mandate usage these days. Especially for programming. The honest truth is that it does speed up development. The other honest truth is that there's resistance to change that harms productivity at times like this and the only way around that is for leadership to be very direct on this point.
To use a metaphor employers don't want weavers who refuse to make use of the loom. https://en.wikipedia.org/wiki/Luddite