It was somewhat, yes (Rider certainly saw it as such at the time), but Dark Archer never actually heard it (although Rin did), and Satoshi has shown no signs of actually having any desire to harm servants in general or, even, Archer in particular. At worst he doesn't care about their well-being as much as he would for a normal human, and that is hardly an attitude Rin can criticise him for given how she treated them and thought about them when she summoned Archer.
Plus, technically, Dark Archer is not a servant any more....