. οὔτε γὰρ τῷ λαμβάνοντι χάριτος ἴσης ἄξιον,
The favors being equal; it is not worthy of the receiver. Gen abs
The translation is very idiosyncratic:for the favor, if scattered broadcast, is not so highly prized by the rational recipient,
Most of its words are not in the original.
More literally it’s “For neither to the taker is it worth equal gratitude”—which makes good sense in context. There’s no gen.abs., and you misconstrue the dative.