If they know you are leaving would they leave first?” vent”

Hi everyone, i did block my ex few days ago, after i get so exhausted from everything, we were in NC but still following each other in almost everything, my ex used to break NC when they want to get validation from me, even tho they are in new relationship with teenager now ( my ex in early 20’s) , and I can’t help this child from what they will go through eventually, this was my last straw i cant witness this, the same circle with more vulnerable person,and i am very aware that they are aware of that they using people around them,I really hope that my block made my ex feel rejected and abandoned as much as possible, i really hope that they never see it comes, i still feel so much anger about everything happened and happening rn