I understand and appreciate what you're saying 100% Hive account@alfar, online content consumption definitely favors the short and flashy. However, the good news, which I only know through personal experience, is that online writing is definitely a skill you develop, not inherit.
A few years ago my writing was probably much closer to your style than my own, (minus all the science and math lol), and even still I often struggle with trying to turn what I think should be a 10 page essay into a 600-1500 word blog-post with flashy images. But I've struggled through the process enough times now that the struggle is more mental than anything else ("but I wanna write how I wanna write!", he with a nasally whine and a childish stomp of the feet"). So my humble advice is to just keep grinding away and try to make each post slightly more easily-digestible than the last. You'll be surprised how quickly your writing will transform itself if you just take continue to take baby steps. Good luck my man!