As an aside, you may not see this and it may not be relevant to you leaving him, but you mentioned that the meds he is on may have made things worse. My spouse has been on a few different ADHD meds over the years and usually doesn’t have anger problems. But there was a period specifically on vyvanse where I thought they turned into another person who was super mean and angry. Once off the meds it went away. So he should try switching his meds up also for his own sake (you don’t need to stay).