does it get worse with age?

I'm at a loss with this question because of conflicting information I have found, both here  (latest was a 2014 post) and other internet resources. So, I thought I would ask those who are in the thick of it every day:

Does ADHD get worse with age? Specifically, UNTREATED ADHD? 

I suspect that anything left untreated and to its own devices gets worse as time passes. I mean, that seems logical to me, a non-ADHD. If nothing else, I have learned that nothing with ADHD makes sense. I have gained understanding and am learning to be compassionate towards my husband. I'm learning the art of boundaries. I'm trying really hard to let go of expectations so that disappointments don't come as frequently (or at least don't hit me as hard). But it seems like the anger and its ourbursts, the self-centeredness, lack of responsbility or accountability, and such are simply increasing each day.  I can only remove myself from the room or house so many times before it isn't effective. When I return, it's like I'm more of an annoyance than anything else. Man, that stings no matter how much of a duck I try to be! UGH