Well, then I would not call it a “problem” of the CPU. You are right that Ryzen is only up to close to Intel in single threaded performance and it gives Intel an advantage in some applications (even though this advantage has diminishing trend with the latest Zen 2). But in general, in VR the usual bottleneck is the GPU bandwidth, which also (usually) takes away any edge Intel may have.
There are some things which needs to be ironed out on the SW side, e.g. core scheduling, but I guess this is just the price of the new arch (Zen 2), and I believe Microsoft has been looking into it recently.
On the other hand, in other domains AMD has an advantage over Intel:
- power consumption
- upgrade path (AM4 should accommodate Zen 3 to be released the next year)
- security (less security holes in the hardware)
I do not want to start a polemic about Intel vs AMD, (I have been running Intel CPUs for the past 20 years and only last year changed to AMD), just thought that the remark about the CPU problems was not totally accurate.