Yes, some vendors tried to put a good CPU in a budget chassi, worst screen you could find, no battery life, terrible build quality etc. No shit it didn't sell.
And not sure what "bad experiences" here amount to, has nothing to do with what CPU was inside but most probably the brand of the device. And that might partly because the vendor had no experience in that ecosystem and had to do much from scratch or whatever.
But most likely they just didn't put in the effort (if the poor build quality and components didn't already tell you that), which kind of makes sense given the weird situation we are in.
How much of that can be attributed to intel, and how much can be attributed to vendors having absolutely no vision and no desire to make anything but literal safe crap, I have no idea.
But, even if intel didn't do anything wrong I wouldn't be surprised with the outcome. It is not like the ecosystem for intel hardware is great either. It took decades before microsoft gave up and launched their own Surface-line of computers simply because all the combined efforts of all manufacturers could barely produce anything of value.
Just as google had to launch their own Pixel line because all other vendors would just produce crap that people then associated with android.