I think the (rather odd) outrage is coming from the fact that many here likely aren't Digital Foundry's target audience. DF is a great place to read about the little technical details about games, things you wouldn't normally notice. However, many Nintendo fans have a gameplay first mentality and don't really care too much about graphics and tech, and the one that do (like me, sorta) would definitely not hold them over gameplay. To someone who doesn't care at all about that kind of thing, mentioning that one frame drops every 64 frames sounds like finding something negative to say for the sake of it. However, that's something DF always does, and it is not out of malice. It is for the sake of being interesting, informative, and complete.
Digital Foundry provides a lot of technical insight by scrutinizing the smallest details, and it is even a great way to learn a few things about 3D rendering. I very much enjoy reading DF articles about games I will never play and don't care about playing, because the topic really is enjoyable to me. Their articles aren't click-bait, and the goal of the articles isn't to make a game less fun or to turn you away from it. It is just a good read.
It is okay if it is not your thing. If reading articles like that actually make games less fun to you, that's fine, and even understandable, but I think it is a mistake and also just plain mean to call the whole thing trash and Eurogamer, DF, and/or its readers trash because it isn't something you are interested in.
Some of the outrage also seems to come from the fact that DF is criticizing this game harsher than some other games, which I don't really agree with, either... It is clear by the language used in the article that the game is great and that the tiny technical issues (which is their "job" to point out) are near inconsequential, but yet they have to point them out anyway.