The child doesn’t “owe” the parent for supporting them while they’re a minor, and one of the best ways to NOT have a close relationship is to keep beating the drum about having fulfilled a basic parental responsibility.

The number of times my mother has given me guilt-trips about the fact that she took large vitamin tablets which were hard to swallow when she was pregnant with me...

(I think she harps on about the vitamin tablets because all of her post-birth behaviour was abominable)