We can say that pretty much everything is subjective in this case, doesn't make you can't criticize it. I mean, we criticize anime and medium all the time even though it's also subjective. >I can overlook subpar writing as long as I'm entertained.
Like I said, generally, something has to be well written in order to be entertaining. Well written doesn't need to have specific elements or goals, it just needs to be something that's well written, at least that's my opinion. But of course, things like personal preferences also play a part and that's fine, Digi is just expressing his opinions and preferences on the matter in a strong way, but he probably knows that's his opinion in the end.