What are the current issues with the AI?
It would honestly be easier to list the things that the AI is decent at.

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The AI ruins matches in so many different ways. In general, Id say: It is just very very easy to beat, even if you dont use any exploits and if there arent any
major(catastrophic) mistakes it makes. But even these do happen.
For example: I had a few decent early months against the Soviet Union as Germany, it was an interesting back and forth between the two nations. I was able to encircle 500k enemy soldiers every now and then but thered always be more. So far so good. Until one day the northern half of the Soviet army decided to strategically redeploy
somewhere, for no apparent reason. I was able to push, they couldnt recover, won the war, but not in a very satisfying way.