I do not understand the popular opinion that Intel does nothing. They absolutely do a lot of things.
We are all disappointed that they are failing to bring out proper competition to AMD Ryzens but come on.
After Sandy Bridge they did 22nm and 14nm manufacturing processes, arguably the 10nm process and 7nm is somewhere in the pipeline.
In terms of CPUs, AVX2, extending execution resources and caches, adding new tech as it comes along etc. And Ice Lake has even more substantial changes than that. Current Comet Lake (which is a rehashed Skylake from 2015) is ~25% faster than Sandy Bridge with single core load at the same clock. Ice Lake is a good step faster than that, Intel's 18% has been verified to be true enough.
This is just mainline CPUs. There is the Atom line that Intel seems to be getting back to with Tremont. There is XPoint with hopefully new gen coming out at one point.
Plus there are a bunch of other things Intel does with varying degrees of success - NAND Flash and controllers, FPGAs come to mind. Packaging technologies like EMIB or Foveros. Mobile modems and 5G is something they failed at.
It's not that Intel hasn't done anything, it's more that they've over promised and under delivered time and time again when it comes to a lot of their products.
Unfortunately this is what happens when you have a de facto monopoly in any industry, so this is by no means unique to Intel.
They also tried to jump further than was technically possible with their process node, as they believed that they could go down a different and supposedly better router, which turned out to be a disaster in the end. However, due to management decisions, this wasn't knocked on the head early enough, instead they tried to salvage it several times over, which lead to further delays. This is how many a company has gone bust, but luckily for Intel, there wasn't much competition, so they could continue using their current node.
This doesn't even take into account all the security holes Intel has been struggling to patch, which makes the company look like they haven't even bothered to check their products properly, as they affect so many generations of processors. There will obviously always be things like this cropping up, as someone will always find a way to bypass security, but it feels like Intel has been lazy here.
Now the competition has caught up and is about to potentially supersede Intel on many levels, which is what makes Intel look bad.
We obviously have limited insight into what they're working on, but the information that is available makes it look like it's at last another 2-3 years before Intel might be able to sort all this out and be back with something truly competitive, both in terms of process node and desktop CPU performance.
However, you are right that Intel is also working on a lot of other things, although XPoint wasn't done just by Intel, as it was co-designed with Micron and the FPGA was added though an acquisition of Altera, so that wasn't developed in-house.
Maybe the loss of focus is partially what caused some of the problems in the company, there were too many BU's fighting for resources and that's why things are where they are today. I guess you also forgot about Intel's attempt at competing with ARM in the mobile phone space, which ended in a disaster, as there's no other word for it.
Is Intel a terrible company because of all this? Of course not, but it shows that even the giants can fall from grace.