How to complain about an abusive editor?
If you want it to stop, the best way to address the issue is to address it with the editor himself. That's not a guarantee that it will be addressed, it could very well be the case that the editor is aware of how his requests are perceived by the most people in the field, and is choosing to run the journal this way anyways.

You mentioned that you avoid submitting to this journal. If you want to lower the prestige of the journal, you could publicize the unprofessional practices of the editor, and encourage your colleagues to submit to better, more professional journals instead. As MxNx mentioned in the comments, there are many good journals they could submit to instead. If many people in your field stop submitting to this journal, chances are it will fall in prestige and possibly fail eventually, unless the practices change.