Why can't he respect boundaries?

Anonymous
Yesterday, my boyfriend whose soon to be my ex said he would come by to my apartment to get his money his cashed app to me. I told him no I'm busy and if you needed your money you could have gotten it the day before because you knew I had a busy week with school work. He starts rambling on about his problems which I told him I don't want to hear about it - his roommate , his parents, and his old job unless he was making changes. Where the disrespect came in at he started yelling in my ear and comparing me to his parents.. I just moved and getting use to the area plus have my own stress to deal with.. college , homeschooling my kids, soon to be work , and setting boundaries with toxic parents / family - I'm in theraphy 1 a week and don't need the extra stress... he keeps bringing up about his job , room mate , and parents.. pushing this stress on me plus I told him I need the weekend to myself... completely disregarded that to talk to me...

What to do because after he acted up yesterday I felt distance was best , but now I want to end it. He has too much stress going on and I'm trying to figure out how he will have a healthy relationship with me while dealing with everyone else..
Updates
10 mo
He can't respect boundaries after me telling him that I'm under stress and need space
Why can't he respect boundaries?
2 Opinion