He doesn't but he's stating stuff he doesn't know about...
Look here:
https://www.anandtech.com/show/14664/testing-intel-ice-lake-10nm/4
Last table you see IPC in INT/FP of Ice Lake is better than 3900X which is a best case scenario for Zen 2. Renoir will have lower IPC than 3900x because of smaller cache.
The fact that Intel has sh*t process in the 10nm and it doesn't allow them to make a good product out of Ice Lake for desktop it doesn't mean suddenly they lost their technical advantage or that Zen 2 is some miracle uArch that the world has never ever seen.
Zen 2 is a good uArch which is put in a very good light thanks to TSMC 7nm. If it were to be fabricated on 12nm, AMD couldn't fit this amount of cache and even if they could the power consumption would have been much worse. Ice Lake is the other way around. It inherits all the advantages of Skylake uArch (which btw is still decent even if fabbed on 14nm and you can check the power/performance number for the latest 10th gen parts here on techpowerup, you'll see that 10700/10500/10300 are pretty similar to what 3700x/3600/3300x achieve in efficiency and absolute performance) that is low latency between cores, low latency to memory but it is held on by the bad 10nm process.
I don't want to detract anything from AMD merits, because they do have the chiplet implementation and in general a very good/smart implementation all around. But I don't like this stupid, clueless hate speech towards Intel products only because they stalled progress, they sell old parts at higher prices than AMD or whatever.
We should discuss technicalities in an objective manner and analyze each product without bias. If you will look on what I said about 10700/10500/10300 you'll see it is true. They do keep up with latest AMD parts in power and performance. Worse pricing, but technically they are similar which is something given they are basically respinned 5 year old parts. I bet you that AMD couldn't do that with their Buldozer parts, push them and still compete.
You will also see that the table from anandtech shows clearly that Ice Lake with its Sunny Cove core is indeed better than Zen 2 all around. If you leave the hate behind for a second and just analyze you'll see the reality. But it is getting harder and harder these days for people to be objective and it is all just a childish fanboy talk with 0 knowledge about actual facts.