AMD has made a 2x improvement in the last few years, bringing it on par with Intel right now. Nothing in the scale of the 100x that we've seen in ARM. The scale here is so different that "oh after 10 years of doing nothing, AMD has a 20% IPC improvement this generation" and "oh Zen 3 will have a 15% IPC improvement" isn't going to make a difference.
Like it or not, x86 has been stagnant in the last 10 years compared to ARM. You could argue it wasn't 2x improvement for x86, but 2.5x if you include AMD. The point still stands.
If you seriously think the improvements in AMD in the last 10 years is on par with ARM's, you're living in a fantasy world.
The fact that you think AMD has "made huge strides", aka made 20% IPC improvements in 5 years which is usually the performance improvements that ARM processors usually have in 1 year, is evidence that x86 is stagnant.
I would love for x86 to be vibrant again, to see 20% year-on-year IPC improvements. It just hasn't happened in the last 10 years.