bad guy

I recently heard from a couple with several children, one of whom has ADHD.  The husband also has ADHD and is struggling to get his symptoms under control.  He rarely follows up on what he promises to do, which is driving his wife crazy. In this context, the husband asked the question "Should we tell our kids about my ADHD?  My wife is concerned that she is always coming across as the bad guy, rather than me."  Hold up there!  Let's discuss both the question and the answer!