Parenting

I need help.  My ADHD husband is very inconsistent with disciplining our kids and with keeping normal school routines, etc.  BUT he thinks I am undermining him when I discipline or when I try to keep a constant routine (such as with bedtimes, no TV at night, etc.....)  HELP !!!! I am ready to throw in the towel- How do we raise our kids when only one parent is consistent ??