Over-giving is not quite the same thing as generosity. Generosity is neither entangling nor aggressive, because the generous person doesn’t expect anything in return.
The over-giver doesn’t expect anything in return either — except to be petted and feted and praised and loved unconditionally for the rest of time (and I was) — so that’s not emotionally loaded. Nothing toxic there!
Also see the story of George Price and his quest for the origin of altruism.