Intel's foremost problem is not sticking to a product. If you aren't going to stick to one, why release a lineup in the first place?
And AMD doesn't have GPU marketshare because they keep avoiding halo lineup for mediocre strategies like mid-end dies rather than aiming for Nvidia on the top end. Halo is what is on the mindshare for everyone. And of course you won't steal marketshare from Nvidia in one generation. You do that for years, and then people will start to pay attention to you. It has all to do with trust, execute for years, and you build trust. Won't happen with a middling part.
And both AMD/Intel copy Nvidia strategies for graphics, and be a fast follower at the best for things like DLSS and frame gen, rather than making halo and creating a feature that they can lead with. 1% and 10% marketshare is not a coincidence. Nvidia earned trust by executing year after year after year. You want to win? Then be a winner. How long before AMD took significant marketshare from Intel? Didn't happen in Zen 1, 2, or even 3. But it's happening now and kept accelerating every generation.