Considering they used a periodicity of 240 frames they were likely just checking to make sure the objective quality roughly met their standards and decided to share the numbers for anyone curious. In our opinion, checking every 240 frames is very coarse and could potentialy be inaccurate - we typically do every 11 frames at most. Either way, we agree metrics alone are arbitrary and meaningless to the uneducated. That is why we provided a list of releasers that use similar encoding settings to help get a general picture of what kind of quality this release has. Some of those releasers also provide comparisons if you want to do deeper analysis.

Unfortunately, you completely glossed over our main point: no one is entitled to comparisons made by the releaser. They are often provided as a courtesy, not as part of some requirement.

If you are truly concerned about the quality then you can peruse the screenshots on this website and check against the source, Erai-raws, or against another similar release like DKB. Presumably previous episodes can be checked in the same manner and provide you with even more viable comparisons. You're demanding them to do all this extra work when what's already available is more than sufficient enough to answer the subjective question: "Is the quality any good?"

If you don't think 5 screenshots, the video files themselves (You can also stream it on gofilie.io or krakenfiles if downloading 100mb is too much of a commitment), and objective metrics aren't enough to answer the question for you then you'll have to take matters into your own hands and use the tools we listed earlier to do the analysis as you see fit. And if you don't want to do any of that then that's fine, just continue on with your day.