You're assuming they actually read the paper. I'm guessing the editors simply rejected it based on the title / topic. This might be understandable, given that they probably get lots of cranks submitting similar sounding papers.
On a different note, I think you have the responsibilities of authors and editors mixed up: it is up to the author of a paper to select an appropriate journal and weigh their chances, the editor is only responsible for the quality of their own journal. Yes it would be great if they also gave you free advice about other journals, but it's really not their job.
On a different note, I think you have the responsibilities of authors and editors mixed up: it is up to the author of a paper to select an appropriate journal and weigh their chances, the editor is only responsible for the quality of their own journal. Yes it would be great if they also gave you free advice about other journals, but it's really not their job.