I actually love using the Galaxy Map filters and then double-checking planetary distances and station types/details in the System Map to identify new trade routes. The problem is I very much dislike then being forced to resort to 14th century methods of manual tabulation and note-taking.
So I just EliteOCR everything in my path and upload to my favorite 3rd party tool to do the remembering and number-crunching for me. As a result, I'm a heavy contributor to the crowdsourced data AND I'm essentially giving away all the good great routes I find to everyone else for free!
Only.... It doesn't really work out that way. Despite me laying it all out crystal clear in a detailed guide (*cough*Guides forum*cough*), and despite me happily uploading the data for every system I explore to find my pet trade routes, nobody has yet come along and stolen my pet 16,000 cr/ton/hour (or better) trade route of the week from me. Why? Because most people go after the shiny big numbers that are easy to see and don't look for the shiny big numbers that are harder to see. Even with all the ways you can crunch and filter those numbers with the 3rd party tools.
The best routes are in _very_ non-obvious places with very not-thrilling per-unit numbers involved. And even stating exactly that fact over and over with examples both in my guide and in various forum posts, most people just don't seem to *see* it.
As a result, I trade in and around the core and have been milking the same run uncontested since the supply rate "fix" just before 1.1 landed. Despite the data to find that run being out there in plain sight.