Your comment was too long and was not respectful of my time. Couldn't you have found a way to convey your sense of entitlement to the content that other people freely provide you in a more succinct way?
To improve the wording, I'd suggest something that doesn't imply intent on behalf of the author and solely reflects your own personal views. For example: "I wish the emails were shorter as I don't have time for long-form content". It gets your point across that you have limited time and would prefer concise emails, but doesn't infer anything regarding respect (or the lack thereof) towards you.
I do wish your original comment had been a little less snarky; I’d like to contribute more to HN but it’s not so easy when replies seem to assume entitlement/bad faith/etc.
I think the difference is that people give authors advice prior to writing an article which amounts to "be mindful that your readers will have to read this". And given that authors have a broad range of readers, it's perfectly fine for an author to consider this and still go ahead with something that's long form and detailed because there's a good chunk of their readership who actively appreciates it (and possibly expects it given patio11's typical article length).
Essentially, claiming the author shows you a lack of respect is disrespectful of the author for the work they put into it. Who has the greater onus to offer respect: someone who actively works to put out free in-depth articles that nobody is under any obligation to read, or those who passively consume those articles? Those who wish to read short announcements can simply say "Great post with lots of details, but is there a channel I can subscribe to which gives me short announcements?" That demonstrates respect.
While patio11 may not follow this particular suggestion for potentially valid reasons that he may or may not have, it was good feedback either way.
[1]-It mostly referred to his or her experience negatively, not the text itself. This seems superficial, but it does matter anyway.
[2]-The RSS point validates the experience, and makes it easier for the author to understand.
[3]-The tl;dr bit was a specific suggestion to improve his or her experience.