Could just be post-breakup cope. "I used them and definitely not the other way around."Ealier chapter it show that she do the witch marrige to gain more magic power from them, and then ditch the partner.
Now: "why they all leaving ?, i did raise your magic, didn't i "
Well, it is small detail so author probally recont without notice. Or author purporly do it to make Melissa guilty free ?
Melissa was the Tanya's idol, same the Master was the Melissa idolso did tanya travel to melissa after hearing she was the ultimate witch? im confused why she went there in the first place