I'm not going to deconstruct the whole thing to appease a stranger, but let's just take the first point of the argument: That it’s easier to imagine the end of the world than the end of the internet.
Setting aside what does "end of the world" actually mean, who's making this statement?
Almost nobody is, since practically every instance is someone referencing somebody else with little commitment. Essentially this is arguing against a person instead of some wide-spread view.
Even if it was wide spread, does it even matter?
It obviously can't be true since end of the world in any reasonable understanding contains end of the internet. So what exactly is this point and argument against it trying to show? I have no idea since believing or not in something dying generally matters little to it being (or not) in such process.
Let's say it is important. What are the arguments that it is incorrect beyond being obviously so?
Well, some unrelated people before you were incorrect about unrelated shape of future so you, but not the author, probably are too. Then he follows this by putting words in mouth of the people he disagrees with, before he swerves into his own experiencing of internet consumption and resulting numbness. I guess based on his expectations of near future there's an expectation of universality of his experience, but even if it was universal (and huge amounts of emotions exhibited online create at least some doubt that it is), why would it contribute to internet's death? It obviously doesn't stop him from scrolling, or writing and otherwise engaging on internet. Again, I have no idea.
So all of it does not really add up to much, but I admit it is entertainingly written which is more than most of us manage.